:root {
  color-scheme: light dark;

  --bg: #faf9f6;
  --surface: #ffffff;
  --surface-hover: #f3f1ec;
  --border: #e6e2d8;
  --text: #1c1e1b;
  --text-muted: #6f6a5e;

  --accent: #0f7c82;
  --accent-hover: #0b6167;
  --accent-soft: #e3f2f1;

  --correct: #0ea57a;
  --correct-soft: #d9f5ea;
  --incorrect: #d8492a;
  --incorrect-soft: #fbe6df;

  --disabled: #b6b1a4;

  --shadow-sm: 0 1px 2px rgba(28, 30, 27, 0.06), 0 1px 1px rgba(28, 30, 27, 0.04);
  --shadow-md: 0 6px 16px rgba(28, 30, 27, 0.08), 0 2px 4px rgba(28, 30, 27, 0.05);

  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  --ticker-size: clamp(56px, 16vw, 84px);
  --row-gap: 14px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --enter-duration: 320ms;
  --exit-duration: 220ms;
  --pop-duration: 260ms;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15181a;
    --surface: #1e2225;
    --surface-hover: #262b2e;
    --border: #303539;
    --text: #eceae4;
    --text-muted: #9a978c;

    --accent: #59c2c4;
    --accent-hover: #7ad3d4;
    --accent-soft: #1c3436;

    --correct-soft: #103a2c;
    --incorrect-soft: #3d2019;

    --disabled: #565b5e;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.35);
  }
}

* {
  box-sizing: border-box;
}

body {
  padding: 32px 20px 64px;
  max-width: 720px;
  margin: 0 auto;
  background-color: var(--bg);
  color: var(--text);
  font-family: 'Inter', sans-serif;
}

@media (max-width: 500px) {
  body {
    padding: 20px 14px 48px;
  }
}

div,
p,
a,
input,
label,
button,
h1 {
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  letter-spacing: .1px;
}

.bold {
  font-weight: 700;
}

button {
  cursor: pointer;
  touch-action: manipulation;
  font: inherit;
}

button:disabled {
  cursor: not-allowed;
}

.icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Header */

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: nowrap;
  padding-bottom: 20px;
}

.app-title {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.2px;
  white-space: nowrap;
}

.app-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: none;
  background: none;
  border-radius: var(--radius-pill);
  padding: 10px 16px;
  min-height: 44px;
  font-weight: 600;
  color: var(--accent);
  transition: background-color 160ms var(--ease), color 160ms var(--ease), transform 120ms var(--ease);
}

.btn:hover {
  background-color: var(--accent-soft);
  color: var(--accent-hover);
}

.btn:active {
  transform: scale(0.96);
}

.btn:disabled,
.btn:disabled:hover {
  color: var(--disabled);
  background: none;
}

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

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

@media (max-width: 500px) {
  .app-header {
    gap: 10px;
  }

  .app-title {
    font-size: 17px;
  }

  /* Shrink Undo/Clear (padding, gap, icon, text) rather than hiding
     their labels, so they still fit in the same row as the title. */
  .app-actions {
    gap: 4px;
  }

  .app-actions .btn {
    padding: 8px 10px;
    gap: 5px;
    min-height: 38px;
    font-size: 13px;
  }

  .app-actions .btn .icon {
    width: 15px;
    height: 15px;
  }
}

@media (max-width: 360px) {
  .app-header {
    gap: 6px;
  }

  .app-title {
    font-size: 15px;
  }

  .app-actions .btn {
    padding: 7px 8px;
  }
}

/* Column labels */

.columns {
  display: grid;
  grid-template-columns: 1fr var(--ticker-size) var(--ticker-size);
  gap: var(--row-gap);
  padding: 0 18px 10px;
}

.column-label {
  text-align: center;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

/* Rows */

.row-wrapper {
  display: flex;
  flex-direction: column;
}

.row {
  display: grid;
  grid-template-columns: 1fr var(--ticker-size) var(--ticker-size);
  align-items: start;
  gap: var(--row-gap);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 18px;
  margin-bottom: var(--row-gap);
  overflow: hidden;
}

.row.template {
  display: none;
}

.row.row-enter {
  animation: row-enter var(--enter-duration) var(--ease) both;
}

.row.row-exit {
  transition: max-height var(--exit-duration) var(--ease),
    opacity calc(var(--exit-duration) * 0.8) ease,
    transform var(--exit-duration) var(--ease),
    margin-bottom var(--exit-duration) var(--ease),
    padding var(--exit-duration) var(--ease),
    border-width var(--exit-duration) var(--ease);
  opacity: 0;
  transform: scale(0.94);
  max-height: 0 !important;
  margin-bottom: 0;
  padding-top: 0;
  padding-bottom: 0;
  border-width: 0;
}

@keyframes row-enter {
  0% {
    opacity: 0;
    transform: translateY(10px) scale(0.97);
  }

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

@media (prefers-reduced-motion: reduce) {

  .row.row-enter,
  .row.row-exit,
  .ticker.pop {
    animation: none !important;
    transition: none !important;
  }
}

.row-info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-width: 0;
}

.name-fields {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  width: 100%;
  margin-bottom: 12px;
}

.row-info input {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background-color: var(--bg);
  color: var(--text);
  /* 16px avoids iOS Safari auto-zooming the page on focus. */
  font-size: 16px;
  flex: 1 1 96px;
  min-width: 96px;
}

.row-info input::placeholder {
  color: var(--text-muted);
}

.row-info input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.row-info .stats {
  display: flex;
  flex-direction: row;
  gap: 16px;
  margin-bottom: 10px;
}

.row-info .stats span {
  font-size: 13px;
}

.row-info .stats .total {
  color: var(--text-muted);
  font-weight: 600;
}

.row-info .stats .percent {
  font-weight: 700;
}

.delete-row .icon {
  width: 14px;
  height: 14px;
}

.delete-row {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: none;
  background: none;
  padding: 6px 10px 6px 6px;
  border-radius: var(--radius-pill);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  transition: background-color 160ms var(--ease), color 160ms var(--ease);
}

.delete-row:hover {
  color: var(--incorrect);
  background-color: var(--incorrect-soft);
}

.ticker {
  width: var(--ticker-size);
  height: var(--ticker-size);
  border: none;
  border-radius: var(--radius-lg);
  background: var(--incorrect);
  color: #ffffff;
  font-size: clamp(18px, 6vw, 24px);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  box-shadow: var(--shadow-sm);
  transition: transform 120ms var(--ease), box-shadow 120ms var(--ease);
  justify-self: center;
}

.ticker.correct {
  background-color: var(--correct);
}

.ticker:hover {
  box-shadow: var(--shadow-md);
}

.ticker:active {
  transform: scale(0.92);
}

.ticker.pop {
  animation: ticker-pop var(--pop-duration) var(--ease);
}

@keyframes ticker-pop {
  0% {
    transform: scale(1);
  }

  35% {
    transform: scale(1.12);
  }

  100% {
    transform: scale(1);
  }
}

#add-row {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: none;
  margin-top: 6px;
  color: var(--accent);
  font-weight: 700;
  padding: 12px 18px;
  border-radius: var(--radius-pill);
  background-color: var(--accent-soft);
  transition: background-color 160ms var(--ease), color 160ms var(--ease), transform 120ms var(--ease);
}

#add-row:hover {
  background-color: var(--accent);
  color: #ffffff;
}

#add-row:active {
  transform: scale(0.97);
}

.app-footer {
  margin-top: 32px;
  padding-top: 16px;
  text-align: center;
}

.app-footer a {
  color: var(--text-muted);
  font-size: 13px;
  text-decoration: underline;
}

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