/* Import Sora Font */
@font-face {
  font-family: 'Sora';
  src: url('./assets/fonts/Sora/Sora-VariableFont_wght.ttf') format('truetype');
  font-weight: 100 900;
  font-display: swap;
}

/* CSS Variables */
:root {
  /* Colors */
  --neutral-900: hsl(0, 0%, 7%);
  --neutral-800: hsl(0, 0%, 15%);
  --neutral-500: hsl(240, 3%, 46%);
  --neutral-400: hsl(240, 1%, 59%);
  --neutral-0: hsl(0, 0%, 100%);
  
  --blue-600: hsl(214, 100%, 55%);
  --blue-400: hsl(210, 100%, 65%);
  
  --red-500: hsl(354, 63%, 57%);
  --green-500: hsl(140, 63%, 57%);
  --yellow-400: hsl(49, 85%, 70%);
  
  /* Typography */
  --font-family: 'Sora', sans-serif;
  --font-size-base: 16px;
  
  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  
  /* Transitions */
  --transition: all 0.3s ease;
}

/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Body */
body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  background-color: var(--neutral-900);
  color: var(--neutral-0);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
}

/* Container */
.container {
  flex: 1;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-md);
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-2xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.logo {
  display: flex;
  align-items: center;
}

.logo-large {
  display: none;
}

.logo-small {
  display: block;
  height: 32px;
}

.personal-best {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 14px;
  color: var(--neutral-400);
}

.pb-icon {
  width: 20px;
  height: 20px;
}

.personal-best strong {
  color: var(--yellow-400);
  font-weight: 700;
}

/* Stats Bar */
.stats-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--neutral-800);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  min-width: 80px;
  flex: 1;
}

.stat-label {
  font-size: 12px;
  color: var(--neutral-400);
  font-weight: 400;
}

.stat-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--neutral-0);
  transition: color 0.3s ease;
}

/* Controls */
.controls {
  display: flex;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.control-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.control-label {
  font-size: 14px;
  color: var(--neutral-400);
  font-weight: 400;
}

/* Dropdown */
.dropdown {
  position: relative;
}

.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  background-color: var(--neutral-800);
  color: var(--neutral-0);
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  min-width: 140px;
}

.dropdown-toggle:hover {
  border-color: var(--blue-600);
}

.dropdown-toggle:focus {
  outline: none;
  border-color: var(--blue-600);
}

.dropdown-arrow {
  width: 12px;
  height: 12px;
  transition: transform 0.3s ease;
  margin-left: auto;
}

.dropdown.open .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  background-color: var(--neutral-800);
  border-radius: var(--radius-sm);
  list-style: none;
  min-width: 100%;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  transition: var(--transition);
  color: var(--neutral-400);
  font-weight: 600;
}

.dropdown-item:hover {
  background-color: var(--neutral-900);
  color: var(--neutral-0);
}

.dropdown-item.active {
  color: var(--blue-600);
}

/* Test Area */
.test-area {
  background-color: var(--neutral-800);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  min-height: 350px;
  position: relative;
}

/* Not Started State */
.test-not-started {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xl);
  text-align: center;
}

.passage-display {
  font-size: 16px;
  line-height: 1.8;
  color: var(--neutral-400);
  max-width: 700px;
  margin-bottom: var(--spacing-md);
  cursor: pointer;
  transition: color 0.3s ease;
}

.passage-display:hover {
  color: var(--neutral-0);
}

.btn-start {
  background: linear-gradient(135deg, var(--blue-600), var(--blue-400));
  color: var(--neutral-0);
  border: none;
  border-radius: var(--radius-md);
  padding: var(--spacing-md) var(--spacing-xl);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(49, 137, 255, 0.3);
}

.btn-start:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(49, 137, 255, 0.4);
}

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

.instruction {
  font-size: 14px;
  color: var(--neutral-500);
}

/* Active Test State */
.test-active {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.passage-typing {
  font-size: 18px;
  line-height: 2;
  letter-spacing: 0.5px;
  cursor: text;
  user-select: none;
  min-height: 150px;
  position: relative;
}

.passage-typing .char {
  position: relative;
  color: var(--neutral-500);
  transition: color 0.1s ease;
}

.passage-typing .char.correct {
  color: var(--green-500);
}

.passage-typing .char.incorrect {
  color: var(--red-500);
  text-decoration: underline;
}

.passage-typing .char.current {
  background-color: var(--blue-600);
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 50%, 100% { opacity: 1; }
  25%, 75% { opacity: 0.3; }
}

.btn-restart {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  background-color: var(--neutral-900);
  color: var(--neutral-0);
  border: 2px solid var(--neutral-800);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  align-self: center;
}

.btn-restart:hover {
  border-color: var(--blue-600);
  transform: translateY(-2px);
}

.btn-restart img {
  width: 16px;
  height: 16px;
}

/* Results State */
.test-results {
  display: flex;
  justify-content: center;
  align-items: center;
}

.results-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-lg);
  text-align: center;
  max-width: 500px;
}

.results-icon {
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--green-500);
  border-radius: 50%;
  animation: scaleIn 0.5s ease;
}

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

.results-icon img {
  width: 40px;
  height: 40px;
}

.results-icon.new-pb {
  background: linear-gradient(135deg, var(--yellow-400), var(--blue-600));
  animation: scaleInRotate 0.5s ease;
}

@keyframes scaleInRotate {
  0% { transform: scale(0) rotate(-180deg); }
  50% { transform: scale(1.1) rotate(10deg); }
  100% { transform: scale(1) rotate(0deg); }
}

.results-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--neutral-0);
}

.results-message {
  font-size: 16px;
  color: var(--neutral-400);
  margin-bottom: var(--spacing-md);
}

.results-stats {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  width: 100%;
  background-color: var(--neutral-900);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
}

.result-stat {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
}

.result-label {
  font-size: 16px;
  color: var(--neutral-400);
  font-weight: 600;
}

.result-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--neutral-0);
}

.btn-again {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  background-color: var(--neutral-0);
  color: var(--neutral-900);
  border: none;
  border-radius: var(--radius-md);
  padding: var(--spacing-md) var(--spacing-xl);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  margin-top: var(--spacing-md);
}

.btn-again:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(255, 255, 255, 0.2);
}

.btn-again img {
  width: 16px;
  height: 16px;
  filter: brightness(0);
}

/* Hidden Class */
.hidden {
  display: none !important;
}

/* Confetti Canvas */
.confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.confetti-canvas.active {
  opacity: 1;
}

/* Attribution */
.attribution {
  font-size: 11px;
  text-align: center;
  padding: var(--spacing-lg);
  color: var(--neutral-500);
}

.attribution a {
  color: var(--blue-600);
  text-decoration: none;
  transition: var(--transition);
}

.attribution a:hover {
  color: var(--blue-400);
}

/* Responsive Design */
@media (min-width: 768px) {
  .container {
    padding: var(--spacing-xl) var(--spacing-lg);
  }
  
  .logo-large {
    display: block;
    height: 40px;
  }
  
  .logo-small {
    display: none;
  }
  
  .stats-bar {
    padding: var(--spacing-lg);
    flex-wrap: nowrap;
  }
  
  .stat {
    flex-direction: row;
    gap: var(--spacing-sm);
    min-width: auto;
  }
  
  .stat-label {
    font-size: 14px;
  }
  
  .stat-value {
    font-size: 32px;
  }
  
  .test-area {
    padding: var(--spacing-xl);
    min-height: 400px;
  }
  
  .passage-display {
    font-size: 20px;
  }
  
  .passage-typing {
    font-size: 22px;
    min-height: 200px;
  }
}

@media (min-width: 1024px) {
  .container {
    padding: var(--spacing-2xl) var(--spacing-xl);
  }
  
  .header {
    margin-bottom: 48px;
  }
  
  .test-area {
    min-height: 500px;
    padding: var(--spacing-2xl) 60px;
  }
  
  .passage-typing {
    font-size: 24px;
  }
}

/* Focus States */
button:focus-visible,
.dropdown-toggle:focus-visible {
  outline: 2px solid var(--blue-600);
  outline-offset: 2px;
}

/* Smooth Scroll */
html {
  scroll-behavior: smooth;
}

/* Selection */
::selection {
  background-color: var(--blue-600);
  color: var(--neutral-0);
}