/* ============================================
   DESIGN TOKENS
   ============================================ */
:root {
  /* Colors */
  --bg-primary: #0a0a1a;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --bg-card-border: rgba(255, 255, 255, 0.08);

  --text-primary: #f0f0f5;
  --text-secondary: rgba(240, 240, 245, 0.55);
  --text-muted: rgba(240, 240, 245, 0.3);

  --accent-1: #a855f7;
  --accent-2: #6366f1;
  --accent-3: #ec4899;
  --accent-gradient: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  --accent-gradient-warm: linear-gradient(135deg, var(--accent-3), var(--accent-1));

  --success: #22c55e;
  --danger: #ef4444;

  /* Typography */
  --font-main: 'Outfit', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

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

  /* Radii */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-glow: 0 0 60px rgba(168, 85, 247, 0.15);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3), 0 1px 4px rgba(0, 0, 0, 0.2);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
}

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

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   ANIMATED BACKGROUND ORBS
   ============================================ */
.bg-orbs {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.35;
  will-change: transform;
}

.orb-1 {
  width: 400px;
  height: 400px;
  background: var(--accent-1);
  top: -10%;
  left: -10%;
  animation: orbFloat1 18s ease-in-out infinite;
}

.orb-2 {
  width: 350px;
  height: 350px;
  background: var(--accent-2);
  bottom: -5%;
  right: -10%;
  animation: orbFloat2 22s ease-in-out infinite;
}

.orb-3 {
  width: 300px;
  height: 300px;
  background: var(--accent-3);
  top: 40%;
  left: 50%;
  animation: orbFloat3 20s ease-in-out infinite;
}

@keyframes orbFloat1 {

  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  33% {
    transform: translate(80px, 60px) scale(1.1);
  }

  66% {
    transform: translate(-40px, 100px) scale(0.9);
  }
}

@keyframes orbFloat2 {

  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  33% {
    transform: translate(-70px, -50px) scale(1.15);
  }

  66% {
    transform: translate(60px, -80px) scale(0.85);
  }
}

@keyframes orbFloat3 {

  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  33% {
    transform: translate(50px, -70px) scale(1.05);
  }

  66% {
    transform: translate(-80px, 30px) scale(0.95);
  }
}

/* ============================================
   APP LAYOUT
   ============================================ */
.app {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-lg) var(--space-md);
  max-width: 480px;
  margin: 0 auto;
  min-height: 100dvh;
  gap: var(--space-lg);
}

/* ============================================
   HEADER
   ============================================ */
.header {
  text-align: center;
  padding-top: var(--space-lg);
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
}

.logo-icon {
  font-size: 2rem;
  animation: micBounce 2s ease-in-out infinite;
}

@keyframes micBounce {

  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }

  25% {
    transform: translateY(-4px) rotate(-5deg);
  }

  75% {
    transform: translateY(-2px) rotate(3deg);
  }
}

.logo-text {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.logo-accent {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  margin-top: var(--space-xs);
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

/* ============================================
   CARD (Glassmorphism)
   ============================================ */
.card {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card);
  transition: background var(--duration-normal) var(--ease-out),
    border-color var(--duration-normal) var(--ease-out);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.12);
}

/* ============================================
   CONTROLS CARD
   ============================================ */
.controls-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

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

.control-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

.label-icon {
  font-size: 1rem;
}

.duration-badge {
  margin-left: auto;
  background: var(--accent-gradient);
  color: white;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-full);
  letter-spacing: 0;
}

/* Select Input */
.select-wrapper {
  position: relative;
}

.select-input {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  padding: 0.75rem 1rem;
  padding-right: 2.5rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out);
}

.select-input:focus {
  outline: none;
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.2);
}

.select-input option {
  background: #1a1a2e;
  color: var(--text-primary);
}

.select-arrow {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  pointer-events: none;
  font-size: 0.9rem;
}

/* Range Slider */
.range-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  outline: none;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out);
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent-gradient);
  cursor: pointer;
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 12px rgba(168, 85, 247, 0.4);
  transition: transform var(--duration-fast) var(--ease-spring),
    box-shadow var(--duration-fast) var(--ease-out);
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 20px rgba(168, 85, 247, 0.6);
}

.range-slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent-gradient);
  cursor: pointer;
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 12px rgba(168, 85, 247, 0.4);
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  padding: 0 2px;
}

/* ============================================
   WORD DISPLAY CARD
   ============================================ */
.word-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-2xl) var(--space-xl);
  min-height: 280px;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.word-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(168, 85, 247, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.word-card.active {
  border-color: rgba(168, 85, 247, 0.25);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.word-card:active {
  transform: scale(0.98);
  transition: transform var(--duration-fast) var(--ease-out);
}

/* Timer Ring */
.timer-ring-container {
  position: relative;
  width: 100px;
  height: 100px;
}

.timer-ring {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.timer-ring-bg {
  fill: none;
  stroke: rgba(255, 255, 255, 0.06);
  stroke-width: 6;
}

.timer-ring-progress {
  fill: none;
  stroke: url(#timerGradient);
  stroke-width: 6;
  stroke-linecap: round;
  stroke-dasharray: 565.48;
  stroke-dashoffset: 565.48;
  transition: stroke-dashoffset 0.1s linear;
}

.timer-inner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.timer-countdown {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Word Text */
.word-display {
  position: relative;
  text-align: center;
  min-height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-xs);
}

.word-text {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: opacity var(--duration-normal) var(--ease-out),
    transform var(--duration-normal) var(--ease-out);
}

.word-description {
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--text-secondary);
  text-align: center;
  min-height: 1.5rem;
  margin-bottom: var(--space-md);
  opacity: 0.8;
  max-width: 80%;
}

.word-text.pop-in {
  animation: wordPopIn 0.4s var(--ease-spring);
}

@keyframes wordPopIn {
  0% {
    opacity: 0;
    transform: scale(0.7) translateY(10px);
  }

  100% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.word-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

/* ============================================
   START / STOP BUTTON
   ============================================ */
.btn-start {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  width: 100%;
  padding: 1rem 2rem;
  border: none;
  border-radius: var(--radius-lg);
  background: var(--accent-gradient);
  color: white;
  font-family: var(--font-main);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform var(--duration-fast) var(--ease-spring),
    box-shadow var(--duration-fast) var(--ease-out);
  box-shadow: 0 4px 24px rgba(168, 85, 247, 0.3);
}

.btn-start::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.15), transparent);
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.btn-start:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(168, 85, 247, 0.4);
}

.btn-start:hover::before {
  opacity: 1;
}

.btn-start:active {
  transform: translateY(0) scale(0.98);
}

.btn-start.is-running {
  background: linear-gradient(135deg, var(--danger), #dc2626);
  box-shadow: 0 4px 24px rgba(239, 68, 68, 0.3);
}

.btn-start.is-running:hover {
  box-shadow: 0 8px 32px rgba(239, 68, 68, 0.4);
}

.btn-icon {
  font-size: 1.1rem;
  display: flex;
  align-items: center;
}

/* ============================================
   STATS CARD
   ============================================ */
.stats-card {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  padding: var(--space-lg) var(--space-xl);
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255, 255, 255, 0.08);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: var(--space-md) 0;
  text-align: center;
}

.footer p {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* ============================================
   RESPONSIVE - TABLET & DESKTOP
   ============================================ */
@media (min-width: 640px) {
  .app {
    padding: var(--space-2xl) var(--space-xl);
    gap: var(--space-xl);
  }

  .logo-text {
    font-size: 2.25rem;
  }

  .word-text {
    font-size: 2.8rem;
  }

  .word-card {
    min-height: 320px;
    padding: var(--space-2xl);
  }

  .timer-ring-container {
    width: 120px;
    height: 120px;
  }

  .timer-countdown {
    font-size: 1.8rem;
  }
}

@media (min-width: 1024px) {
  .app {
    max-width: 560px;
    padding-top: 4rem;
  }

  .card:hover {
    transform: translateY(-2px);
  }
}

/* ============================================
   ACCESSIBILITY - REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {

  .orb,
  .logo-icon {
    animation: none;
  }

  .word-text.pop-in {
    animation: none;
  }

  .card:hover {
    transform: none;
  }

  .btn-start:hover {
    transform: none;
  }
}

/* ============================================
   LOADING STATE
   ============================================ */
.loading-spinner {
  width: 24px;
  height: 24px;
  border: 3px solid rgba(255, 255, 255, 0.15);
  border-top-color: var(--accent-1);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 0 auto;
}

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

/* Disabled state for controls during run */
.controls-card.disabled {
  opacity: 0.5;
  pointer-events: none;
}