/* ==========================================
   ReflexLab - Reaction Time Test
   Dark Theme Styles
   ========================================== */

/* ==========================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ========================================== */
:root {
  /* Colors - Dark Theme */
  --color-bg-primary: #0a0a0b;
  --color-bg-secondary: #111113;
  --color-bg-tertiary: #18181b;
  --color-bg-card: #141416;
  --color-bg-hover: #1f1f23;

  /* Text Colors */
  --color-text-primary: #fafafa;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #71717a;
  --color-text-disabled: #52525b;

  /* Accent Colors */
  --color-accent: #22c55e;
  --color-accent-hover: #16a34a;
  --color-accent-glow: rgba(34, 197, 94, 0.2);
  --color-accent-subtle: rgba(34, 197, 94, 0.1);

  /* State Colors */
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-error-glow: rgba(239, 68, 68, 0.2);
  --color-waiting: #3b82f6;
  --color-waiting-glow: rgba(59, 130, 246, 0.15);

  /* Borders */
  --color-border: #27272a;
  --color-border-subtle: #1f1f23;
  --color-border-focus: var(--color-accent);

  /* Rank Colors */
  --color-rank-elite: #a855f7;
  --color-rank-pro: #22c55e;
  --color-rank-advanced: #3b82f6;
  --color-rank-intermediate: #f59e0b;
  --color-rank-beginner: #71717a;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Monaco, Consolas,
    monospace;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.5rem;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4),
    0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4),
    0 4px 6px -4px rgba(0, 0, 0, 0.3);
  --shadow-glow-accent: 0 0 20px var(--color-accent-glow),
    0 0 40px var(--color-accent-glow);
  --shadow-glow-error: 0 0 20px var(--color-error-glow),
    0 0 40px var(--color-error-glow);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;

  /* Layout */
  --max-width: 960px;
  --nav-height: 64px;
}

/* ==========================================
   RESET & BASE STYLES
   ========================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + var(--space-lg));
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-accent);
  color: var(--color-bg-primary);
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  z-index: 1000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-md);
}

/* ==========================================
   TYPOGRAPHY
   ========================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
}

h1 {
  font-size: var(--font-size-4xl);
}
h2 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-lg);
}
h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
}

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

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

a:hover {
  color: var(--color-accent-hover);
}

/* Content links - light underline style */
.info-section a,
.tip-card a {
  color: var(--color-text-primary);
  text-decoration: underline;
  text-decoration-color: rgba(255, 255, 255, 0.4);
  text-underline-offset: 2px;
}

.info-section a:hover,
.tip-card a:hover {
  text-decoration-color: rgba(255, 255, 255, 0.7);
}

strong {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

/* ==========================================
   LAYOUT UTILITIES
   ========================================== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
}

/* ==========================================
   NAVIGATION
   ========================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 11, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

.brand-logo {
  flex-shrink: 0;
}

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

.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Nav control buttons */
.btn-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  height: 36px;
  padding: 0 var(--space-md);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-nav:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-text-muted);
  color: var(--color-text-primary);
}

.btn-nav:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-nav i {
  font-size: var(--font-size-lg);
}

.btn-nav.muted {
  color: var(--color-text-muted);
}

/* Icon-only nav button (sound toggle) */
#sound-toggle {
  padding: 0;
  width: 36px;
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero-section {
  padding: var(--space-3xl) var(--space-lg) var(--space-md);
  text-align: center;
}

.hero-content {
  max-width: 600px;
  margin: 0 auto;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  min-height: 44px;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: var(--color-bg-primary);
  border-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow-accent);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

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

.btn-sm {
  font-size: var(--font-size-sm);
  padding: var(--space-xs) var(--space-md);
  min-height: 36px;
}

.btn-reset {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
  font-size: var(--font-size-xs);
  padding: var(--space-xs) var(--space-md);
  min-height: 32px;
}

.btn-reset:hover {
  color: var(--color-text-secondary);
  border-color: var(--color-text-muted);
}

/* ==========================================
   TEST SECTION
   ========================================== */
.test-section {
  padding: 0 var(--space-lg) var(--space-3xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.test-card {
  width: 100%;
  max-width: 960px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* Settings Panel */
.settings-panel {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border-subtle);
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.setting-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}

/* Button Group */
.btn-group {
  display: flex;
  gap: var(--space-sm);
}

.btn-option {
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 44px;
  text-align: center;
}

.btn-option:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-text-muted);
  color: var(--color-text-primary);
}

.btn-option.active {
  background: var(--color-bg-primary);
  border-color: var(--color-accent);
  color: var(--color-text-primary);
}

.btn-option.active:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-accent);
}

.btn-option:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ==========================================
   TEST AREA
   ========================================== */
.test-area {
  min-height: 340px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  user-select: none;
  position: relative;
  overflow: hidden;
}

.test-area:focus {
  outline: none;
}

.test-area:focus-visible {
  outline: none;
}

.test-area-content {
  text-align: center;
  z-index: 1;
  padding: 0 var(--space-lg);
}

.test-hint {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  font-style: italic;
}

.hint-box {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  vertical-align: middle;
  margin-right: 2px;
}

.hint-box-red {
  background: var(--color-error);
}

.hint-box-green {
  background: var(--color-accent);
}

.test-status {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-xs);
  color: var(--color-text-primary);
}

.test-result {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  font-family: var(--font-mono);
  margin-bottom: var(--space-xs);
}

.test-instruction {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* Test Area States */
.test-area.state-idle {
  background: var(--color-bg-tertiary);
  border: 2px solid var(--color-border);
}

.test-area.state-idle:hover {
  border-color: var(--color-text-muted);
  background: var(--color-bg-hover);
}

.test-area.state-waiting {
  background: linear-gradient(135deg, #2a1a1a 0%, #3d1f1f 100%);
  border: 2px solid var(--color-error);
  box-shadow: 0 0 30px var(--color-error-glow);
}

.test-area.state-waiting .test-status {
  animation: pulse-text 1.5s ease-in-out infinite;
}

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

.test-area.state-go {
  background: linear-gradient(135deg, #064e3b 0%, #065f46 100%);
  border: 2px solid var(--color-accent);
  box-shadow: var(--shadow-glow-accent);
}

.test-area.state-go .test-status {
  color: var(--color-accent);
  animation: pulse-go 0.3s ease-out;
}

@keyframes pulse-go {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
  }
}

.test-area.state-result {
  background: var(--color-bg-tertiary);
  border: 2px solid var(--color-border);
}

.test-area.state-result .test-result {
  color: var(--color-accent);
}

.test-area.state-false-start {
  background: linear-gradient(135deg, #450a0a 0%, #7f1d1d 100%);
  border: 2px solid var(--color-error);
  box-shadow: var(--shadow-glow-error);
}

.test-area.state-false-start .test-status {
  color: var(--color-error);
  animation: shake 0.4s ease-out;
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-5px);
  }
  75% {
    transform: translateX(5px);
  }
}

/* Session Complete State */
.test-area.state-session-complete {
  background: var(--color-bg-tertiary);
  border: 2px solid var(--color-border);
  min-height: 320px;
  cursor: default;
}

/* Rank-colored borders for session complete */
.test-area.state-session-complete.rank-elite {
  border-color: var(--color-rank-elite);
  box-shadow: 0 0 20px rgba(168, 85, 247, 0.2), 0 0 40px rgba(168, 85, 247, 0.1);
}

.test-area.state-session-complete.rank-pro {
  border-color: var(--color-rank-pro);
  box-shadow: 0 0 20px rgba(34, 197, 94, 0.2), 0 0 40px rgba(34, 197, 94, 0.1);
}

.test-area.state-session-complete.rank-advanced {
  border-color: var(--color-rank-advanced);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.2), 0 0 40px rgba(59, 130, 246, 0.1);
}

.test-area.state-session-complete.rank-intermediate {
  border-color: var(--color-rank-intermediate);
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.2), 0 0 40px rgba(245, 158, 11, 0.1);
}

.test-area.state-session-complete.rank-beginner {
  border-color: var(--color-rank-beginner);
  box-shadow: 0 0 20px rgba(113, 113, 122, 0.2),
    0 0 40px rgba(113, 113, 122, 0.1);
}

/* Results inside test area */
.test-area-results {
  text-align: center;
  z-index: 1;
  width: 100%;
  padding: var(--space-lg);
}

/* Individual attempts row at top */
.attempts-row {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-lg);
}

.attempt-column {
  text-align: center;
  min-width: 60px;
}

.attempt-column .attempt-time {
  display: block;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  font-family: var(--font-mono);
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.attempt-column .attempt-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Main result card */
.main-result-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl) var(--space-2xl);
  margin-bottom: var(--space-lg);
}

.result-heading {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.result-time-row {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.result-time {
  font-size: 4rem;
  font-weight: var(--font-weight-bold);
  font-family: var(--font-mono);
  color: var(--color-text-primary);
  line-height: 1;
}

.result-unit {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}

.rank-badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-transform: capitalize;
  letter-spacing: 0.05em;
}

/* Rank badge colors */
.rank-badge.elite {
  background: rgba(168, 85, 247, 0.2);
  color: var(--color-rank-elite);
  border: 1px solid rgba(168, 85, 247, 0.3);
}

.rank-badge.pro {
  background: rgba(34, 197, 94, 0.2);
  color: var(--color-rank-pro);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.rank-badge.advanced {
  background: rgba(59, 130, 246, 0.2);
  color: var(--color-rank-advanced);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.rank-badge.intermediate {
  background: rgba(245, 158, 11, 0.2);
  color: var(--color-rank-intermediate);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.rank-badge.beginner {
  background: rgba(113, 113, 122, 0.2);
  color: var(--color-rank-beginner);
  border: 1px solid rgba(113, 113, 122, 0.3);
}

/* Motivational message */
.result-message {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

.btn-try-again {
  min-width: 160px;
  background: var(--color-text-primary);
  color: var(--color-bg-primary);
  border-color: var(--color-text-primary);
}

.btn-try-again:hover {
  background: var(--color-text-secondary);
  border-color: var(--color-text-secondary);
}

/* ==========================================
   PROGRESS WIDGETS
   ========================================== */
.progress-widgets {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  width: 100%;
  max-width: 960px;
  box-sizing: border-box;
}

.widget {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  min-width: 0;
  overflow: hidden;
}

.widget-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.trophy-icon {
  font-size: var(--font-size-lg);
}

/* Personal Best Widget */
.widget-personal-best {
  display: flex;
  flex-direction: column;
}

.pb-section {
  padding-bottom: var(--space-md);
  margin-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border-subtle);
}

.pb-section:last-of-type {
  border-bottom: none;
  margin-bottom: var(--space-sm);
  padding-bottom: 0;
}

.pb-section .widget-title {
  margin-bottom: var(--space-md);
}

.pb-score-display {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  margin-bottom: var(--space-xs);
  flex-wrap: wrap;
}

.pb-time {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  font-family: var(--font-mono);
  color: var(--color-text-primary);
  line-height: 1;
}

.pb-unit {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
}

.pb-rank-badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: capitalize;
  letter-spacing: 0.05em;
}

.pb-rank-badge.elite {
  background: rgba(168, 85, 247, 0.2);
  color: var(--color-rank-elite);
}

.pb-rank-badge.pro {
  background: rgba(34, 197, 94, 0.2);
  color: var(--color-rank-pro);
}

.pb-rank-badge.advanced {
  background: rgba(59, 130, 246, 0.2);
  color: var(--color-rank-advanced);
}

.pb-rank-badge.intermediate {
  background: rgba(245, 158, 11, 0.2);
  color: var(--color-rank-intermediate);
}

.pb-rank-badge.beginner {
  background: rgba(113, 113, 122, 0.2);
  color: var(--color-rank-beginner);
}

.pb-subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.pb-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: 0;
  margin-top: var(--space-sm);
}

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

/* Trend Widget */
.widget-trend {
  display: flex;
  flex-direction: column;
  height: 402px;
}

.trend-icon {
  font-size: var(--font-size-lg);
}

.chart-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.chart-description.hidden {
  display: none;
}

.chart-empty-message {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-style: italic;
  margin-bottom: 0;
}

.chart-empty-message.hidden {
  display: none;
}

.chart-container {
  flex: 1;
  position: relative;
  width: 100%;
  max-width: 100%;
  margin-top: auto;
}

/* Rank Checklist Widget */
.widget-rank-checklist {
  display: flex;
  flex-direction: column;
}

.rank-checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.rank-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.rank-item.achieved {
  background: var(--color-bg-tertiary);
}

.rank-check {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-muted);
  min-width: 20px;
  text-align: center;
}

.rank-item.achieved .rank-check {
  color: var(--color-accent);
}

.rank-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.rank-info .rank-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.rank-item.achieved .rank-name {
  color: var(--color-text-primary);
}

.rank-info .rank-range {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Responsive Widgets */
@media (max-width: 992px) {
  .progress-widgets {
    grid-template-columns: 1fr;
  }

  .chart-container {
    min-height: 120px;
  }
}

/* ==========================================
   HISTORY LOG WIDGET
   ========================================== */
.widget-history {
  display: flex;
  flex-direction: column;
  height: 402px;
}

.history-icon {
  font-size: var(--font-size-lg);
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  flex: 1;
  min-height: 0;
  overflow-y: auto;
}

.history-list::-webkit-scrollbar {
  width: 6px;
}

.history-list::-webkit-scrollbar-track {
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
}

.history-list::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

.history-list::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

.history-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
}

.history-score {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  font-family: var(--font-mono);
  color: var(--color-text-primary);
  min-width: 70px;
}

.history-type {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-sm);
}

.history-rank {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
}

.history-rank.elite {
  background: rgba(168, 85, 247, 0.2);
  color: var(--color-rank-elite);
}

.history-rank.pro {
  background: rgba(34, 197, 94, 0.2);
  color: var(--color-rank-pro);
}

.history-rank.advanced {
  background: rgba(59, 130, 246, 0.2);
  color: var(--color-rank-advanced);
}

.history-rank.intermediate {
  background: rgba(245, 158, 11, 0.2);
  color: var(--color-rank-intermediate);
}

.history-rank.beginner {
  background: rgba(113, 113, 122, 0.2);
  color: var(--color-rank-beginner);
}

.history-time {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-left: auto;
}

.history-empty-message {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: center;
  padding: var(--space-lg);
  font-style: italic;
  margin-bottom: 0;
}

.history-empty-message.hidden {
  display: none;
}

/* Press/Click Animation */
.test-area:active:not(.state-waiting):not(.state-session-complete) {
  transform: scale(0.98);
}

/* Progress Bar */
.progress-bar-container {
  width: 100%;
  height: 4px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

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

/* ==========================================
   CONFIRMATION MODAL
   ========================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-lg);
}

.modal-overlay[hidden] {
  display: none;
}

.modal {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  max-width: 400px;
  width: 100%;
  text-align: center;
  animation: modalFadeIn 0.2s ease-out;
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
}

.modal-message {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
  line-height: var(--line-height-relaxed);
}

.modal-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
}

.btn-danger {
  background: var(--color-error);
  color: var(--color-text-primary);
  border-color: var(--color-error);
}

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

/* ==========================================
   RESULTS PANEL
   ========================================== */
.results-panel {
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-subtle);
}

.results-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.results-summary {
  display: flex;
  justify-content: space-around;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

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

.stat-label {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.stat-value {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  font-family: var(--font-mono);
  color: var(--color-text-primary);
}

.stat-value.highlight {
  color: var(--color-accent);
}

.stat-value.rank {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
}

/* Rank Colors */
.stat-value.rank.elite {
  color: var(--color-rank-elite);
}
.stat-value.rank.pro {
  color: var(--color-rank-pro);
}
.stat-value.rank.advanced {
  color: var(--color-rank-advanced);
}
.stat-value.rank.intermediate {
  color: var(--color-rank-intermediate);
}
.stat-value.rank.beginner {
  color: var(--color-rank-beginner);
}

/* Attempts List */
.attempts-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  justify-content: center;
}

.attempt-item {
  font-size: var(--font-size-xs);
  font-family: var(--font-mono);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
}

.attempt-item.best {
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

/* ==========================================
   INFORMATIONAL SECTIONS
   ========================================== */
.info-section {
  padding: var(--space-3xl) var(--space-lg);
}

.info-section.alt-bg {
  background: transparent;
}

.info-section h2 {
  text-align: left;
  margin-bottom: var(--space-md);
}

.info-section p {
  line-height: var(--line-height-relaxed);
}

/* Utility: adds space between section intro text and content blocks */
.section-content {
  margin-top: var(--space-xl);
}

/* Steps List */
.steps-list {
  margin-bottom: var(--space-xl);
  list-style: none;
  counter-reset: steps;
}

.steps-list li {
  counter-increment: steps;
  position: relative;
  padding-left: var(--space-2xl);
  margin-bottom: var(--space-lg);
}

.steps-list li::before {
  content: counter(steps);
  position: absolute;
  left: 0;
  top: 0;
  width: 24px;
  height: 24px;
  background: var(--color-accent);
  color: var(--color-bg-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
}

.steps-list li strong {
  display: block;
  margin-bottom: var(--space-xs);
}

.steps-list li p {
  margin-bottom: 0;
}

.note {
  background: var(--color-bg-tertiary);
  border-left: 3px solid var(--color-warning);
  padding: var(--space-md);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-top: var(--space-xl);
}

/* Rank Table */
.rank-table {
  margin: var(--space-xl) 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.rank-row {
  display: grid;
  grid-template-columns: 100px 100px 1fr;
  gap: var(--space-md);
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border-subtle);
  align-items: center;
}

.rank-row:last-child {
  border-bottom: none;
}

.rank-name {
  font-weight: var(--font-weight-bold);
}

.rank-row.elite .rank-name {
  color: var(--color-rank-elite);
}
.rank-row.pro .rank-name {
  color: var(--color-rank-pro);
}
.rank-row.advanced .rank-name {
  color: var(--color-rank-advanced);
}
.rank-row.intermediate .rank-name {
  color: var(--color-rank-intermediate);
}
.rank-row.beginner .rank-name {
  color: var(--color-rank-beginner);
}

.rank-range {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.rank-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Tips Grid */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.tips-grid.grid-2x2 {
  grid-template-columns: repeat(2, 1fr);
}

.tip-card {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: border-color var(--transition-fast);
}

.tip-card:hover {
  border-color: var(--color-border);
}

.tip-card-icon {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-sm);
  color: var(--color-accent);
}

.tip-card h3 {
  color: var(--color-text-primary);
}

.tip-card p {
  margin-bottom: 0;
  font-size: var(--font-size-sm);
}

/* Factors List */
.factor {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border-subtle);
}

.factor:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.factor h3 {
  color: var(--color-text-primary);
}

.factor p {
  margin-bottom: 0;
}

/* FAQ Section */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  overflow: hidden;
}

.faq-item summary {
  padding: var(--space-md);
  cursor: pointer;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition-fast);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item summary:hover {
  background: var(--color-bg-hover);
}

.faq-item p {
  padding: 0 var(--space-md) var(--space-md);
  margin-bottom: 0;
}

/* Disclaimer */
.disclaimer-section {
  padding: var(--space-xl) var(--space-lg);
  border-top: 1px solid var(--color-border-subtle);
}

.disclaimer {
  max-width: 720px;
  margin: 0 auto;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: center;
}

/* ==========================================
   FOOTER
   ========================================== */
.site-footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border-subtle);
  padding: var(--space-xl) var(--space-lg);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  text-align: center;
}

.copyright {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: 0;
}

.footer-links {
  display: flex;
  gap: var(--space-lg);
}

.footer-links a {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.footer-links a:hover {
  color: var(--color-text-secondary);
}

.footer-note {
  font-size: var(--font-size-xs);
  color: var(--color-text-disabled);
  margin-bottom: 0;
}

/* ==========================================
   RESPONSIVE STYLES
   ========================================== */

/* Mobile First - Base styles are for mobile */

/* Small devices (landscape phones, 576px and up) */
@media (min-width: 576px) {
  .hero-title {
    font-size: var(--font-size-5xl);
  }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
  .settings-panel {
    flex-wrap: nowrap;
    justify-content: space-between;
  }

  .rank-row {
    grid-template-columns: 120px 120px 1fr;
  }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
  .hero-section {
    padding: var(--space-3xl) var(--space-lg);
  }
}

/* Medium devices and below (992px and down) */
@media (max-width: 992px) {
  .settings-panel {
    order: 3;
    border-bottom: none;
    border-top: 1px solid var(--color-border-subtle);
    padding-bottom: 0;
    padding-top: var(--space-lg);
    flex-wrap: wrap;
    gap: var(--space-md) var(--space-xl);
  }

  .settings-panel .setting-group:last-child {
    flex-basis: 100%;
  }

  .progress-bar-container {
    order: 2;
  }
}

/* Mobile Styles */
@media (max-width: 768px) {
  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-base);
  }

  .test-card {
    padding: var(--space-md);
  }

  .settings-panel {
    flex-direction: column;
    gap: var(--space-md);
    align-items: stretch;
  }

  .btn-group {
    flex-wrap: wrap;
    width: 100%;
  }

  .btn-option {
    padding: var(--space-sm) var(--space-sm);
    font-size: var(--font-size-sm);
    min-width: 36px;
    min-height: 44px;
    flex: 1;
  }

  /* Results display responsive */
  .attempts-row {
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    flex-wrap: wrap;
  }

  .attempt-column {
    min-width: 50px;
  }

  .attempt-column .attempt-time {
    font-size: var(--font-size-base);
  }

  .main-result-card {
    padding: var(--space-lg);
  }

  .result-time {
    font-size: 3rem;
  }

  .rank-row {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-xs);
  }

  .rank-desc {
    display: none;
  }

  .tips-grid,
  .tips-grid.grid-2x2 {
    grid-template-columns: 1fr;
  }
}

/* Extra small devices */
@media (max-width: 360px) {
  :root {
    --space-lg: 1rem;
  }

  .hero-title {
    font-size: var(--font-size-2xl);
  }

  .test-status {
    font-size: var(--font-size-xl);
  }

  .test-result {
    font-size: var(--font-size-3xl);
  }

  .result-time {
    font-size: 2.5rem;
  }

  .attempts-row {
    gap: var(--space-sm);
  }
}

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

  html {
    scroll-behavior: auto;
  }
}