/*
 * pdm-challenges.css
 * PANDEMONIUM BOX · Arena Challenges UI
 * Vanilla CSS · mobile-first · safe-area aware
 */

/* =====================================================================
   Variables y reset base
   ===================================================================== */

:root {
  --pdm-bg: #0a0014;
  --pdm-bg-elev: #14002a;
  --pdm-bg-card: linear-gradient(155deg, #1a0033 0%, #2a0052 100%);
  --pdm-bg-card-spicy: linear-gradient(155deg, #2a0014 0%, #4d0026 100%);
  --pdm-primary: #b46cff;
  --pdm-primary-hover: #c98fff;
  --pdm-accent: #ff3d8f;
  --pdm-success: #4ade80;
  --pdm-warn: #facc15;
  --pdm-error: #f87171;
  --pdm-text: #f5f0ff;
  --pdm-text-dim: #9d8fb3;
  --pdm-text-muted: #6b5d80;
  --pdm-border: rgba(180, 108, 255, 0.18);
  --pdm-border-strong: rgba(180, 108, 255, 0.38);
  --pdm-shadow-card: 0 16px 48px rgba(0, 0, 0, 0.55), 0 4px 16px rgba(180, 108, 255, 0.18);
  --pdm-shadow-modal: 0 24px 72px rgba(0, 0, 0, 0.75);
  --pdm-radius: 14px;
  --pdm-radius-lg: 22px;
  --pdm-radius-sm: 8px;
  --pdm-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, system-ui, sans-serif;
  --pdm-safe-top: env(safe-area-inset-top, 0px);
  --pdm-safe-bottom: env(safe-area-inset-bottom, 0px);
}

*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--pdm-bg);
  color: var(--pdm-text);
  font-family: var(--pdm-font);
  font-size: 16px;
  line-height: 1.5;
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(ellipse at top, #1a0033 0%, transparent 60%),
    radial-gradient(ellipse at bottom, #2a0052 0%, transparent 70%),
    var(--pdm-bg);
}

body.pdm-mode-spicy-active {
  background:
    radial-gradient(ellipse at top, #330014 0%, transparent 60%),
    radial-gradient(ellipse at bottom, #4d0026 0%, transparent 70%),
    var(--pdm-bg);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

/* =====================================================================
   Header
   ===================================================================== */

.pdm-header {
  flex-shrink: 0;
  padding-top: var(--pdm-safe-top);
  background: rgba(10, 0, 20, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--pdm-border);
  z-index: 50;
}

.pdm-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  gap: 12px;
}

.pdm-title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  flex: 1;
  text-align: center;
}

.pdm-back-btn, .pdm-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  color: var(--pdm-text);
  transition: background 160ms ease, transform 160ms ease;
}

.pdm-back-btn:hover, .pdm-icon-btn:hover {
  background: rgba(180, 108, 255, 0.14);
}

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

/* =====================================================================
   Stats bar
   ===================================================================== */

.pdm-stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  padding: 10px 16px;
  background: rgba(20, 0, 42, 0.6);
  border-bottom: 1px solid var(--pdm-border);
  flex-shrink: 0;
}

.pdm-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.pdm-stat-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--pdm-text-dim);
}

.pdm-stat-value {
  font-size: 18px;
  font-weight: 700;
  color: var(--pdm-primary);
}

/* =====================================================================
   Toggle modo TRADITIONAL / SPICY
   ===================================================================== */

.pdm-mode-toggle {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  flex-shrink: 0;
}

.pdm-mode-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 14px;
  border-radius: var(--pdm-radius);
  background: rgba(180, 108, 255, 0.08);
  border: 1px solid var(--pdm-border);
  color: var(--pdm-text-dim);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.2px;
  transition: all 200ms ease;
  position: relative;
}

.pdm-mode-btn:hover {
  background: rgba(180, 108, 255, 0.14);
}

.pdm-mode-active {
  background: linear-gradient(135deg, var(--pdm-primary) 0%, #8a4dff 100%);
  border-color: var(--pdm-primary);
  color: white;
  box-shadow: 0 6px 20px rgba(180, 108, 255, 0.35);
}

.pdm-mode-btn[data-mode="spicy"].pdm-mode-active {
  background: linear-gradient(135deg, var(--pdm-accent) 0%, #c41e7f 100%);
  border-color: var(--pdm-accent);
  box-shadow: 0 6px 20px rgba(255, 61, 143, 0.4);
}

.pdm-mode-icon {
  display: inline-flex;
}

.pdm-mode-lock {
  display: inline-flex;
  margin-left: 4px;
  opacity: 0.7;
}

/* =====================================================================
   Main area + card stack
   ===================================================================== */

.pdm-main {
  flex: 1;
  position: relative;
  overflow: hidden;
  padding: 12px 18px 4px;
  min-height: 0;
}

.pdm-card-stack {
  position: relative;
  width: 100%;
  height: 100%;
  perspective: 1200px;
}

.pdm-card {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: var(--pdm-radius-lg);
  background: var(--pdm-bg-card);
  border: 1px solid var(--pdm-border-strong);
  box-shadow: var(--pdm-shadow-card);
  display: flex;
  flex-direction: column;
  padding: 22px 22px 18px;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  touch-action: pan-y;
  cursor: grab;
  will-change: transform;
  transform-origin: center bottom;
}

.pdm-card:active {
  cursor: grabbing;
}

.pdm-card[data-depth="0"] {
  cursor: grab;
}

body.pdm-mode-spicy-active .pdm-card {
  background: var(--pdm-bg-card-spicy);
  border-color: rgba(255, 61, 143, 0.3);
}

.pdm-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(180, 108, 255, 0.18), transparent 60%);
  pointer-events: none;
}

/* Header card */

.pdm-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  position: relative;
  z-index: 2;
}

.pdm-card-difficulty {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.5px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(180, 108, 255, 0.18);
  color: var(--pdm-primary);
  border: 1px solid var(--pdm-border-strong);
}

.pdm-card-diff-easy { color: var(--pdm-success); border-color: rgba(74, 222, 128, 0.4); background: rgba(74, 222, 128, 0.12); }
.pdm-card-diff-medium { color: var(--pdm-warn); border-color: rgba(250, 204, 21, 0.4); background: rgba(250, 204, 21, 0.12); }
.pdm-card-diff-hard { color: var(--pdm-accent); border-color: rgba(255, 61, 143, 0.4); background: rgba(255, 61, 143, 0.12); }
.pdm-card-diff-extreme { color: var(--pdm-error); border-color: rgba(248, 113, 113, 0.5); background: rgba(248, 113, 113, 0.15); }

.pdm-card-category {
  font-size: 11px;
  color: var(--pdm-text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.pdm-card-spicy-tag {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.5px;
  padding: 4px 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--pdm-accent), #c41e7f);
  color: white;
  margin-left: auto;
}

/* Body card */

.pdm-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  z-index: 2;
  overflow: hidden;
}

.pdm-card-title {
  margin: 0 0 14px;
  font-size: 26px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.3px;
  background: linear-gradient(180deg, #ffffff, #d4baff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.pdm-card-description {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  color: rgba(245, 240, 255, 0.85);
}

/* Footer card */

.pdm-card-footer {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--pdm-border);
  position: relative;
  z-index: 2;
}

.pdm-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.pdm-card-xp, .pdm-card-time {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
}

.pdm-card-xp {
  color: var(--pdm-warn);
}

.pdm-card-time {
  color: var(--pdm-text-dim);
}

/* Overlays SKIP/ACCEPT durante drag */

.pdm-card-overlay {
  position: absolute;
  top: 28px;
  font-size: 32px;
  font-weight: 900;
  letter-spacing: 4px;
  padding: 10px 18px;
  border: 4px solid currentColor;
  border-radius: 12px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 80ms ease;
  z-index: 5;
}

.pdm-card-overlay-skip {
  left: 24px;
  transform: rotate(-18deg);
  color: var(--pdm-error);
}

.pdm-card-overlay-accept {
  right: 24px;
  transform: rotate(18deg);
  color: var(--pdm-success);
}

/* Swipe hint */

.pdm-swipe-hint {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  padding: 0 24px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--pdm-text-muted);
  pointer-events: none;
  z-index: 1;
}

/* Empty + loading */

.pdm-empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 24px;
  text-align: center;
  color: var(--pdm-text-dim);
}

.pdm-empty-icon {
  opacity: 0.5;
}

.pdm-empty-title {
  margin: 0;
  font-size: 18px;
  color: var(--pdm-text);
}

.pdm-empty-text {
  margin: 0;
  font-size: 14px;
}

.pdm-loading {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.pdm-skeleton-card {
  position: absolute;
  inset: 0;
  border-radius: var(--pdm-radius-lg);
  background: linear-gradient(110deg, rgba(180, 108, 255, 0.05) 8%, rgba(180, 108, 255, 0.15) 18%, rgba(180, 108, 255, 0.05) 33%);
  background-size: 200% 100%;
  animation: pdm-shimmer 1.6s infinite linear;
}

@keyframes pdm-shimmer {
  to { background-position-x: -200%; }
}

/* =====================================================================
   Action buttons bottom
   ===================================================================== */

.pdm-actions {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;
  padding: 14px 18px calc(18px + var(--pdm-safe-bottom));
  flex-shrink: 0;
}

.pdm-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--pdm-bg-elev);
  border: 2px solid var(--pdm-border-strong);
  color: var(--pdm-text);
  transition: transform 150ms ease, background 150ms ease, border-color 150ms ease;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.4);
}

.pdm-action-btn:not(:disabled):hover {
  transform: translateY(-2px);
}

.pdm-action-btn:not(:disabled):active {
  transform: scale(0.92);
}

.pdm-action-skip {
  color: var(--pdm-error);
  border-color: rgba(248, 113, 113, 0.5);
}

.pdm-action-skip:not(:disabled):hover {
  background: rgba(248, 113, 113, 0.12);
}

.pdm-action-accept {
  color: var(--pdm-success);
  border-color: rgba(74, 222, 128, 0.55);
  width: 68px;
  height: 68px;
}

.pdm-action-accept:not(:disabled):hover {
  background: rgba(74, 222, 128, 0.14);
}

.pdm-action-info {
  width: 50px;
  height: 50px;
  color: var(--pdm-primary);
}

/* =====================================================================
   Modales generales
   ===================================================================== */

.pdm-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.pdm-modal[hidden] { display: none; }

.pdm-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(5, 0, 14, 0.78);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: pdm-fade-in 200ms ease-out;
}

.pdm-modal-content {
  position: relative;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  background: linear-gradient(160deg, #1a0033 0%, #0a0014 100%);
  border: 1px solid var(--pdm-border-strong);
  border-radius: var(--pdm-radius-lg);
  box-shadow: var(--pdm-shadow-modal);
  padding: 22px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  animation: pdm-slide-up 260ms cubic-bezier(0.2, 0.9, 0.3, 1.1);
}

@keyframes pdm-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pdm-slide-up {
  from { transform: translateY(40px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.pdm-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.pdm-modal-title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.pdm-modal-body {
  font-size: 14px;
  line-height: 1.6;
  color: var(--pdm-text);
}

.pdm-modal-actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.pdm-btn {
  flex: 1;
  padding: 12px 16px;
  border-radius: var(--pdm-radius);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.5px;
  transition: all 180ms ease;
}

.pdm-btn-primary {
  background: linear-gradient(135deg, var(--pdm-primary), #8a4dff);
  color: white;
  box-shadow: 0 6px 18px rgba(180, 108, 255, 0.4);
}

.pdm-btn-primary:not(:disabled):hover {
  background: linear-gradient(135deg, var(--pdm-primary-hover), #9a5dff);
}

.pdm-btn-spicy {
  background: linear-gradient(135deg, var(--pdm-accent), #c41e7f);
  color: white;
  box-shadow: 0 6px 18px rgba(255, 61, 143, 0.4);
}

.pdm-btn-ghost {
  background: transparent;
  border: 1px solid var(--pdm-border);
  color: var(--pdm-text-dim);
}

.pdm-btn-ghost:hover {
  background: rgba(180, 108, 255, 0.08);
  color: var(--pdm-text);
}

/* Spicy disclaimer */

.pdm-modal-spicy {
  border-color: rgba(255, 61, 143, 0.4);
}

.pdm-modal-icon-warn {
  display: flex;
  justify-content: center;
  color: var(--pdm-warn);
  margin-bottom: 14px;
}

.pdm-disclaimer-list {
  margin: 12px 0;
  padding-left: 22px;
  font-size: 13px;
  color: var(--pdm-text-dim);
}

.pdm-disclaimer-list li {
  margin-bottom: 6px;
}

.pdm-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 16px;
  padding: 12px;
  border-radius: var(--pdm-radius-sm);
  background: rgba(255, 61, 143, 0.08);
  border: 1px solid rgba(255, 61, 143, 0.25);
  cursor: pointer;
  font-size: 13px;
}

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

.pdm-checkbox-mark {
  width: 20px;
  height: 20px;
  border-radius: 5px;
  border: 2px solid var(--pdm-accent);
  flex-shrink: 0;
  position: relative;
  transition: background 160ms ease;
}

.pdm-checkbox input:checked + .pdm-checkbox-mark {
  background: var(--pdm-accent);
}

.pdm-checkbox input:checked + .pdm-checkbox-mark::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 1px;
  width: 6px;
  height: 11px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

/* =====================================================================
   Countdown timer challenge
   ===================================================================== */

.pdm-countdown {
  position: relative;
  width: 80px;
  height: 80px;
  margin: 0 auto 14px;
}

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

.pdm-countdown-track {
  fill: none;
  stroke: rgba(180, 108, 255, 0.15);
  stroke-width: 6;
}

.pdm-countdown-progress {
  fill: none;
  stroke: var(--pdm-primary);
  stroke-width: 6;
  stroke-linecap: round;
  transition: stroke-dashoffset 100ms linear, stroke 200ms ease;
}

.pdm-countdown-progress.pdm-countdown-warn {
  stroke: var(--pdm-error);
  animation: pdm-pulse-warn 800ms ease-in-out infinite;
}

@keyframes pdm-pulse-warn {
  50% { opacity: 0.5; }
}

.pdm-countdown-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 16px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--pdm-text);
}

/* =====================================================================
   Proof submission tabs + panels
   ===================================================================== */

.pdm-proof-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--pdm-border);
}

.pdm-proof-tab {
  flex: 1;
  padding: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--pdm-text-dim);
  border-bottom: 2px solid transparent;
  transition: all 160ms ease;
}

.pdm-proof-tab-active {
  color: var(--pdm-primary);
  border-bottom-color: var(--pdm-primary);
}

.pdm-proof-panel {
  display: none;
}

.pdm-proof-panel-active {
  display: block;
}

.pdm-file-drop {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 32px 16px;
  border: 2px dashed var(--pdm-border-strong);
  border-radius: var(--pdm-radius);
  background: rgba(180, 108, 255, 0.05);
  color: var(--pdm-text-dim);
  font-size: 14px;
  cursor: pointer;
  transition: all 180ms ease;
}

.pdm-file-drop:hover {
  background: rgba(180, 108, 255, 0.1);
  border-color: var(--pdm-primary);
  color: var(--pdm-text);
}

.pdm-file-icon {
  color: var(--pdm-primary);
}

.pdm-proof-preview {
  margin-top: 12px;
  border-radius: var(--pdm-radius-sm);
  overflow: hidden;
  border: 1px solid var(--pdm-border);
}

.pdm-proof-preview img, .pdm-proof-preview video {
  display: block;
  width: 100%;
  max-height: 220px;
  object-fit: cover;
}

.pdm-textarea {
  width: 100%;
  padding: 12px;
  border-radius: var(--pdm-radius-sm);
  background: rgba(10, 0, 20, 0.6);
  border: 1px solid var(--pdm-border);
  color: var(--pdm-text);
  font-family: inherit;
  font-size: 14px;
  resize: vertical;
  min-height: 120px;
}

.pdm-textarea:focus {
  outline: none;
  border-color: var(--pdm-primary);
}

.pdm-char-counter {
  margin-top: 6px;
  text-align: right;
  font-size: 12px;
  color: var(--pdm-text-muted);
}

/* =====================================================================
   Result modal XP gain + level up
   ===================================================================== */

.pdm-result-content {
  text-align: center;
  overflow: hidden;
  padding: 32px 22px;
}

.pdm-result-title {
  margin: 0 0 20px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 2.5px;
  color: var(--pdm-success);
  text-transform: uppercase;
}

.pdm-result-xp {
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 6px;
  margin: 10px 0 24px;
}

.pdm-result-xp-value {
  font-size: 64px;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(180deg, #ffe88a, #ffb547);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 30px rgba(255, 181, 71, 0.4);
}

.pdm-result-xp-label {
  font-size: 22px;
  font-weight: 700;
  color: var(--pdm-warn);
}

.pdm-result-levelup {
  margin: 12px 0 24px;
  padding: 16px;
  border-radius: var(--pdm-radius);
  background: linear-gradient(135deg, rgba(180, 108, 255, 0.15), rgba(255, 61, 143, 0.15));
  border: 1px solid var(--pdm-primary);
  animation: pdm-levelup-pop 600ms cubic-bezier(0.2, 1.2, 0.4, 1);
}

@keyframes pdm-levelup-pop {
  0% { transform: scale(0.5); opacity: 0; }
  60% { transform: scale(1.1); }
  100% { transform: scale(1); opacity: 1; }
}

.pdm-levelup-text {
  display: block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 3px;
  color: var(--pdm-primary);
  margin-bottom: 4px;
}

.pdm-levelup-new {
  display: block;
  font-size: 48px;
  font-weight: 900;
  background: linear-gradient(135deg, var(--pdm-primary), var(--pdm-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Flash overlay */

.pdm-result-flash {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.6) 0%, transparent 50%);
  opacity: 0;
  pointer-events: none;
  z-index: 0;
}

.pdm-result-flash.pdm-flash-active {
  animation: pdm-flash 700ms ease-out;
}

@keyframes pdm-flash {
  0% { opacity: 0; }
  20% { opacity: 1; }
  100% { opacity: 0; }
}

/* Burst particles level up */

.pdm-result-burst {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  pointer-events: none;
  z-index: 1;
}

.pdm-burst-particle {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--pdm-warn);
  box-shadow: 0 0 10px var(--pdm-warn);
  animation: pdm-burst-fly 900ms ease-out forwards;
  opacity: 0;
}

@keyframes pdm-burst-fly {
  0% { transform: translate(0, 0) scale(0.5); opacity: 1; }
  100% { transform: translate(var(--dx), var(--dy)) scale(0); opacity: 0; }
}

/* =====================================================================
   Info modal grid
   ===================================================================== */

.pdm-info-grid {
  display: grid;
  gap: 10px;
  margin-bottom: 18px;
}

.pdm-info-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: var(--pdm-radius-sm);
  background: rgba(180, 108, 255, 0.06);
  font-size: 13px;
}

.pdm-info-label {
  color: var(--pdm-text-dim);
}

.pdm-info-value {
  font-weight: 700;
  color: var(--pdm-text);
}

.pdm-info-description {
  margin-bottom: 18px;
}

.pdm-info-description h3 {
  margin: 0 0 6px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--pdm-primary);
}

.pdm-info-description p {
  margin: 0;
  font-size: 14px;
  color: var(--pdm-text);
}

.pdm-info-warning {
  padding: 12px 14px;
  border-radius: var(--pdm-radius-sm);
  background: rgba(250, 204, 21, 0.08);
  border: 1px solid rgba(250, 204, 21, 0.3);
  font-size: 12px;
  color: var(--pdm-warn);
  line-height: 1.5;
}

/* =====================================================================
   Toast notification
   ===================================================================== */

.pdm-toast {
  position: fixed;
  bottom: calc(120px + var(--pdm-safe-bottom));
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  max-width: calc(100vw - 32px);
  padding: 12px 18px;
  border-radius: var(--pdm-radius);
  background: var(--pdm-bg-elev);
  border: 1px solid var(--pdm-border-strong);
  color: var(--pdm-text);
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
  opacity: 0;
  transition: all 240ms cubic-bezier(0.2, 0.9, 0.3, 1.1);
  z-index: 200;
  pointer-events: none;
}

.pdm-toast-show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.pdm-toast-success { border-color: var(--pdm-success); color: var(--pdm-success); }
.pdm-toast-error { border-color: var(--pdm-error); color: var(--pdm-error); }
.pdm-toast-warn { border-color: var(--pdm-warn); color: var(--pdm-warn); }

/* =====================================================================
   Responsive y accesibilidad
   ===================================================================== */

@media (max-width: 380px) {
  .pdm-card-title { font-size: 22px; }
  .pdm-card-description { font-size: 14px; }
  .pdm-action-btn { width: 54px; height: 54px; }
  .pdm-action-accept { width: 60px; height: 60px; }
  .pdm-result-xp-value { font-size: 52px; }
}

@media (min-width: 768px) {
  .pdm-main { padding: 20px 24px 8px; max-width: 520px; margin: 0 auto; width: 100%; }
  .pdm-stats-bar, .pdm-mode-toggle, .pdm-actions {
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

:focus-visible {
  outline: 2px solid var(--pdm-primary);
  outline-offset: 2px;
}