* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
:root {
  --primary-color: #22c55e;
  --primary-dark: #15803d;
  --warning-color: #f59e0b;
  --warning-dark: #d97706;
  --danger-color: #f43f5e;
  --danger-dark: #e11d48;
  --accent-cyan: #67e8f9;
  --accent-purple: #8b5cf6;
  --accent-amber: #fbbf24;
  --background-color: #0b0f1e;
  --background-secondary: #0f1a35;
  --card-background: rgba(12, 20, 40, 0.72);
  --text-primary: #f8fafc;
  --text-secondary: rgba(226, 232, 240, 0.7);
  --border-light: rgba(148, 163, 184, 0.2);
  --shadow-primary: rgba(56, 189, 248, 0.35);
  --border-radius-large: 1.5rem;
  --border-radius-medium: 0.875rem;
  --transition-speed: 0.3s;
  --ring-color: var(--accent-cyan);
  --progress-deg: 0deg;
}
body {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1.25rem;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top, rgba(103, 232, 249, 0.18), transparent 45%),
    radial-gradient(circle at 20% 20%, rgba(139, 92, 246, 0.2), transparent 40%),
    linear-gradient(130deg, var(--background-secondary), var(--background-color));
  color: var(--text-primary);
}

.cursor-glow {
  position: absolute;
  width: 18rem;
  height: 18rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(103, 232, 249, 0.35), transparent 65%);
  pointer-events: none;
  mix-blend-mode: screen;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 0;
}

.cursor-trail {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.progress-container {
  width: 100%;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  padding: 2rem 0;
}

.ambient-orb {
  position: absolute;
  width: 16rem;
  height: 16rem;
  border-radius: 50%;
  filter: blur(0.5rem);
  opacity: 0.7;
  animation: float 12s ease-in-out infinite;
  z-index: 0;
}

.orb--one {
  background: radial-gradient(circle, rgba(103, 232, 249, 0.6), transparent 65%);
  top: -6rem;
  left: -3rem;
}

.orb--two {
  background: radial-gradient(circle, rgba(139, 92, 246, 0.55), transparent 60%);
  bottom: -5rem;
  right: -4rem;
  animation-delay: -4s;
}

.ambient-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.05) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.4;
  z-index: 0;
}

.progress-card {
  width: 100%;
  max-width: 31rem;
  padding: 2.75rem 2.25rem;
  border-radius: var(--border-radius-large);
  background: var(--card-background);
  -webkit-backdrop-filter: blur(0.875rem);
  backdrop-filter: blur(0.875rem);
  border: 1px solid var(--border-light);
  box-shadow: 0 1rem 3rem rgba(3, 7, 18, 0.7);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  position: relative;
  z-index: 1;
  animation: card-enter 0.8s ease;
  overflow: hidden;
  transform-style: preserve-3d;
  transform: perspective(900px) rotateX(var(--card-tilt-x, 0deg)) rotateY(var(--card-tilt-y, 0deg));
}

.progress-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(120deg, rgba(103, 232, 249, 0.1), transparent 40%);
  pointer-events: none;
}

.card-sheen {
  position: absolute;
  inset: -120% 0 0 0;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.18), transparent);
  transform: translateX(-140%) rotate(8deg);
  animation: sheen 6s ease-in-out infinite;
  pointer-events: none;
}

.card-header {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.eyebrow {
  letter-spacing: 0.35em;
  text-transform: uppercase;
  font-size: 0.65rem;
  color: var(--text-secondary);
}

.card-header h1 {
  font-family: "Syne", "Space Grotesk", sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 700;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 0.98rem;
}

.progress-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
}

.progress-ring {
  width: 15rem;
  height: 15rem;
  padding: 1.25rem;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  background: conic-gradient(var(--ring-color) var(--progress-deg), rgba(255, 255, 255, 0.12) 0deg);
  transition:
    background 0.4s ease,
    transform var(--transition-speed),
    box-shadow var(--transition-speed);
  box-shadow: 0 0 1.8rem rgba(94, 234, 212, 0.2);
  position: relative;
  cursor: grab;
  outline: none;
  transform-style: preserve-3d;
  transform: perspective(600px) rotateX(var(--ring-tilt-x, 0deg)) rotateY(var(--ring-tilt-y, 0deg)) scale(var(--ring-scale, 1));
}

.progress-ring:focus-visible {
  box-shadow: 0 0 0 0.2rem rgba(103, 232, 249, 0.4), 0 0 1.8rem rgba(94, 234, 212, 0.2);
}

.progress-ring.animating {
  --ring-scale: 1.035;
  box-shadow: 0 0 2.2rem var(--shadow-primary);
}

.progress-ring.completed {
  --ring-scale: 1.02;
  box-shadow: 0 0 3rem rgba(251, 191, 36, 0.6);
}

.progress-ring__inner {
  width: 11.1rem;
  height: 11.1rem;
  border-radius: 50%;
  background: rgba(248, 250, 252, 0.92);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.4rem;
  box-shadow: inset 0 0 1rem rgba(15, 23, 42, 0.2);
}

#progress-value {
  font-size: clamp(2rem, 5vw, 2.5rem);
  font-weight: 700;
  color: #0f172a;
  transition:
    transform var(--transition-speed),
    color var(--transition-speed);
}

.progress-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: rgba(15, 23, 42, 0.65);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

#progress-value.completing {
  animation: pulse 0.6s ease;
}
@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.12);
  }
  100% {
    transform: scale(1);
  }
}

.button-group {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.875rem;
}

.action-button {
  border: none;
  outline: none;
  padding: 0.875rem 1.5rem;
  border-radius: var(--border-radius-medium);
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;

  transition:
    transform var(--transition-speed),
    background-color var(--transition-speed),
    box-shadow var(--transition-speed),
    opacity var(--transition-speed);
}

.action-button:hover:not(:disabled) {
  transform: translateY(-0.125rem);
}

.action-button:active:not(:disabled) {
  transform: scale(0.97);
}

.action-button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.action-button--start {
  background: var(--primary-color);
  box-shadow: 0 0.25rem 0.875rem rgba(82, 194, 52, 0.35);
}

.action-button--start:hover:not(:disabled) {
  background: var(--primary-dark);
}

.action-button--stop {
  background: var(--warning-color);
  box-shadow: 0 0.25rem 0.875rem rgba(245, 158, 11, 0.35);
}

.action-button--stop:hover:not(:disabled) {
  background: var(--warning-dark);
}

.action-button--reset {
  background: var(--danger-color);
  box-shadow: 0 0.25rem 0.875rem rgba(239, 68, 68, 0.35);
}

.action-button--reset:hover:not(:disabled) {
  background: var(--danger-dark);
}

.restart-state {
  background: #3b82f6 !important;
  box-shadow: 0 0.25rem 0.875rem rgba(59, 130, 246, 0.35);
}

.restart-state:hover {
  background: #2563eb !important;
}

.milestone-row {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  text-align: center;
}

.milestone {
  padding: 0.45rem 0.25rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: rgba(148, 163, 184, 0.12);
  border: 1px solid transparent;
  transition: transform var(--transition-speed), color var(--transition-speed), background var(--transition-speed);
}

.milestone.is-active {
  color: #0f172a;
  background: rgba(255, 255, 255, 0.8);
  border-color: rgba(255, 255, 255, 0.7);
  transform: translateY(-2px);
}

.control-panel {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mode-toggle {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
}

.mode-button {
  background: rgba(148, 163, 184, 0.12);
  color: var(--text-primary);
  border: 1px solid rgba(148, 163, 184, 0.25);
  padding: 0.6rem 0.7rem;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-speed), background var(--transition-speed), border var(--transition-speed);
}

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

.mode-button.is-active {
  background: rgba(103, 232, 249, 0.35);
  border-color: rgba(103, 232, 249, 0.6);
}

.preset-group {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.preset-chip {
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(103, 232, 249, 0.4);
  background: rgba(103, 232, 249, 0.12);
  color: var(--text-primary);
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-speed), background var(--transition-speed);
}

.preset-chip:hover {
  transform: translateY(-2px);
  background: rgba(103, 232, 249, 0.25);
}

.toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.12);
  border: 1px solid rgba(148, 163, 184, 0.25);
  color: var(--text-primary);
  font-weight: 600;
}

.toggle input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.toggle-track {
  width: 3.25rem;
  height: 1.7rem;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.4);
  position: relative;
  transition: background var(--transition-speed), border var(--transition-speed);
}

.toggle-track::after {
  content: "";
  width: 1.2rem;
  height: 1.2rem;
  border-radius: 50%;
  background: #fff;
  position: absolute;
  top: 0.2rem;
  left: 0.2rem;
  transition: transform var(--transition-speed), background var(--transition-speed);
  box-shadow: 0 0.2rem 0.5rem rgba(15, 23, 42, 0.4);
}

.toggle input:checked + .toggle-track {
  background: rgba(103, 232, 249, 0.35);
  border-color: rgba(103, 232, 249, 0.6);
}

.toggle input:checked + .toggle-track::after {
  transform: translateX(1.45rem);
  background: #f8fafc;
}

.status-row {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.stat {
  background: rgba(15, 23, 42, 0.45);
  border-radius: 0.9rem;
  padding: 0.85rem 1rem;
  border: 1px solid rgba(148, 163, 184, 0.2);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

.stat-value {
  font-size: 1.05rem;
  font-weight: 600;
}

.history {
  width: 100%;
  background: rgba(15, 23, 42, 0.45);
  border-radius: 1rem;
  padding: 1rem 1.2rem;
  border: 1px solid rgba(148, 163, 184, 0.2);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.history-header {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
}

.history-count {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

#historySparkline {
  width: 100%;
  height: 4rem;
}

.hint {
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-align: center;
}

.particle-field {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  overflow: hidden;
  pointer-events: none;
}

.orbit-sparks {
  position: absolute;
  inset: -0.6rem;
  border-radius: 50%;
  pointer-events: none;
  animation: orbit 8s linear infinite;
}

.orbit-sparks span {
  position: absolute;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--ring-color);
  box-shadow: 0 0 0.6rem rgba(103, 232, 249, 0.5);
}

.orbit-sparks span:nth-child(1) {
  top: 10%;
  left: 50%;
}

.orbit-sparks span:nth-child(2) {
  top: 50%;
  right: 5%;
}

.orbit-sparks span:nth-child(3) {
  bottom: 12%;
  left: 20%;
}

.orbit-sparks span:nth-child(4) {
  top: 25%;
  left: 10%;
}

.ripple-layer {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.ripple {
  position: absolute;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  border: 2px solid rgba(103, 232, 249, 0.7);
  transform: translate(-50%, -50%) scale(0);
  animation: ripple 0.8s ease-out forwards;
}

.trail-dot {
  position: absolute;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--ring-color);
  opacity: 0.7;
  transform: translate(-50%, -50%) scale(1);
  animation: trail-fade 0.7s ease-out forwards;
}

.particle {
  position: absolute;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--ring-color);
  opacity: 0.8;
  animation: particle-burst 0.8s ease-out forwards;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(12px);
  }
}

@keyframes card-enter {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes particle-burst {
  from {
    transform: translate3d(0, 0, 0) scale(1);
    opacity: 1;
  }
  to {
    transform: translate3d(var(--x), var(--y), 0) scale(0);
    opacity: 0;
  }
}

@keyframes orbit {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes ripple {
  from {
    opacity: 0.7;
    transform: translate(-50%, -50%) scale(0);
  }
  to {
    opacity: 0;
    transform: translate(-50%, -50%) scale(8);
  }
}

@keyframes trail-fade {
  from {
    opacity: 0.7;
    transform: translate(-50%, -50%) scale(1);
  }
  to {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.2);
  }
}

@keyframes sheen {
  0% {
    transform: translateX(-140%) rotate(8deg);
    opacity: 0.2;
  }
  50% {
    opacity: 0.45;
  }
  100% {
    transform: translateX(140%) rotate(8deg);
    opacity: 0.2;
  }
}

@media (max-width: 36rem) {
  .progress-card {
    padding: 2.2rem 1.5rem;
  }

  .progress-ring {
    width: 12.5rem;
    height: 12.5rem;
  }

  .progress-ring__inner {
    width: 9rem;
    height: 9rem;
  }

  .button-group {
    flex-direction: column;
  }

  .action-button {
    width: 100%;
  }

  .status-row {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .progress-card,
  .ambient-orb,
  .progress-ring,
  .particle,
  .orbit-sparks,
  .card-sheen,
  .trail-dot,
  .ripple {
    animation: none !important;
    transition: none !important;
  }
}