:root {
  --bg: #fdf6f0;
  --bg-gradient-a: #ffe3ec;
  --bg-gradient-b: #fff6e0;
  --fg: #2b2233;
  --fg-muted: #7a6f85;
  --card-bg: #ffffff;
  --card-shadow: 0 20px 45px rgba(190, 130, 160, 0.28);
  --accent: #ff5f8f;
  --accent-2: #7c5cff;
  --chip-bg: rgba(124, 92, 255, 0.12);
  --btn-bg: #ffffff;
  --btn-fg: #2b2233;
  --btn-shadow: 0 8px 20px rgba(43, 34, 51, 0.12);
  --overlay-bg: rgba(20, 12, 24, 0.45);
  --panel-bg: #ffffff;
  --border-soft: rgba(43, 34, 51, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #181420;
    --bg-gradient-a: #241a33;
    --bg-gradient-b: #1a1424;
    --fg: #f3eefc;
    --fg-muted: #b7abcc;
    --card-bg: #26203a;
    --card-shadow: 0 20px 45px rgba(0, 0, 0, 0.5);
    --accent: #ff7aa8;
    --accent-2: #9b8cff;
    --chip-bg: rgba(155, 140, 255, 0.18);
    --btn-bg: #2f2745;
    --btn-fg: #f3eefc;
    --btn-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    --overlay-bg: rgba(0, 0, 0, 0.55);
    --panel-bg: #201a30;
    --border-soft: rgba(255, 255, 255, 0.08);
  }
}

:root[data-theme="dark"] {
  --bg: #181420;
  --bg-gradient-a: #241a33;
  --bg-gradient-b: #1a1424;
  --fg: #f3eefc;
  --fg-muted: #b7abcc;
  --card-bg: #26203a;
  --card-shadow: 0 20px 45px rgba(0, 0, 0, 0.5);
  --accent: #ff7aa8;
  --accent-2: #9b8cff;
  --chip-bg: rgba(155, 140, 255, 0.18);
  --btn-bg: #2f2745;
  --btn-fg: #f3eefc;
  --btn-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
  --overlay-bg: rgba(0, 0, 0, 0.55);
  --panel-bg: #201a30;
  --border-soft: rgba(255, 255, 255, 0.08);
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg);
  background-image: radial-gradient(circle at 15% 0%, var(--bg-gradient-a), transparent 55%),
                     radial-gradient(circle at 85% 100%, var(--bg-gradient-b), transparent 55%);
  color: var(--fg);
  font-family: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: max(14px, env(safe-area-inset-top)) 18px 8px;
}

.logo {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.logo .dot {
  color: var(--accent);
}

.icon-btn {
  border: none;
  background: var(--btn-bg);
  color: var(--btn-fg);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  font-size: 1.1rem;
  box-shadow: var(--btn-shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  touch-action: manipulation;
}

.icon-btn:active {
  transform: scale(0.92);
}

.stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 20px calc(24px + env(safe-area-inset-bottom));
  gap: 18px;
}

.deck {
  position: relative;
  width: 100%;
  max-width: 380px;
  aspect-ratio: 3 / 4;
  touch-action: pan-y;
}

.card {
  position: absolute;
  inset: 0;
  background: var(--card-bg);
  border-radius: 28px;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 32px 26px;
  gap: 18px;
  cursor: grab;
  user-select: none;
  transition: transform 0.28s cubic-bezier(0.2, 0.7, 0.3, 1), opacity 0.28s ease;
  will-change: transform;
}

.card.dragging {
  transition: none;
}

.card.swipe-out-left {
  transform: translate(-140%, -8%) rotate(-18deg);
  opacity: 0;
}

.card.swipe-out-right {
  transform: translate(140%, -8%) rotate(18deg);
  opacity: 0;
}

.card-category {
  margin: 0;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-2);
  background: var(--chip-bg);
  padding: 6px 14px;
  border-radius: 999px;
  letter-spacing: 0.02em;
}

.card-text {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.4;
}

.card-text::before {
  content: "Yo nunca... ";
  color: var(--accent);
  font-weight: 800;
}

.progress {
  margin: 0;
  font-size: 0.9rem;
  color: var(--fg-muted);
  font-variant-numeric: tabular-nums;
}

.controls {
  display: flex;
  align-items: center;
  gap: 18px;
}

.ctrl-btn {
  border: none;
  background: var(--btn-bg);
  color: var(--btn-fg);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  font-size: 1.5rem;
  box-shadow: var(--btn-shadow);
  cursor: pointer;
  touch-action: manipulation;
}

.ctrl-btn:active {
  transform: scale(0.92);
}

.ctrl-btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  width: 64px;
  height: 64px;
  font-size: 1.3rem;
}

.hint {
  margin: 0;
  font-size: 0.78rem;
  color: var(--fg-muted);
  text-align: center;
}

.overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  backdrop-filter: blur(2px);
  z-index: 10;
}

.settings {
  position: fixed;
  right: 0;
  top: 0;
  bottom: 0;
  width: min(340px, 86vw);
  background: var(--panel-bg);
  box-shadow: -20px 0 45px rgba(0, 0, 0, 0.25);
  z-index: 20;
  padding: max(20px, env(safe-area-inset-top)) 20px calc(20px + env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 14px;
  transform: translateX(0);
  transition: transform 0.25s ease;
  overflow-y: auto;
}

.settings[hidden] {
  display: none;
}

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.settings-header h2 {
  margin: 0;
  font-size: 1.1rem;
}

.settings-hint {
  margin: 0;
  color: var(--fg-muted);
  font-size: 0.88rem;
}

.category-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.category-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 16px;
  background: var(--chip-bg);
  border: 1px solid var(--border-soft);
}

.category-item label {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  cursor: pointer;
}

.category-item input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--accent);
  flex-shrink: 0;
}

.category-count {
  font-size: 0.78rem;
  color: var(--fg-muted);
  font-weight: 500;
}

.empty-warning {
  margin: 0;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
}

@media (min-width: 520px) {
  .card-text {
    font-size: 1.7rem;
  }
}