/* ═══════════════════════════════════════════════════════════════════════════
   styles.css — Multiplica! App
   Disseny adaptat a infants (7-10 anys): colors vibrants, tipografia gran,
   botons grans, animacions suaus, dark mode per defecte.
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── Custom Properties ─────────────────────────────────────────────────── */
:root {
  --color-bg:          #0f0f1a;
  --color-surface:     #1a1a2e;
  --color-surface-2:   #16213e;
  --color-border:      rgba(255,255,255,0.08);

  --color-primary:     #6C63FF;
  --color-primary-h:   #8b85ff;
  --color-accent:      #ff6584;
  --color-success:     #43d98e;
  --color-danger:      #ff5555;
  --color-warning:     #ffb347;
  --color-memory:      #38bdf8;

  --color-text:        #f0f0f8;
  --color-text-muted:  #9999bb;

  --radius-sm:    10px;
  --radius-md:    18px;
  --radius-lg:    28px;
  --radius-xl:    40px;
  --radius-full:  9999px;

  --shadow-sm:  0 2px 8px rgba(0,0,0,0.3);
  --shadow-md:  0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg:  0 8px 40px rgba(0,0,0,0.5);

  --font-family: 'Nunito', system-ui, sans-serif;
  --transition: all 0.25s cubic-bezier(0.4,0,0.2,1);
}

/* ─── Reset & Base ──────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100dvh;
  overflow-x: hidden;
  background-image:
    radial-gradient(ellipse at 20% 10%, rgba(108,99,255,0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 90%, rgba(255,101,132,0.10) 0%, transparent 50%);
}

/* ─── Screen System ─────────────────────────────────────────────────────── */
.screen {
  display: none;
  flex-direction: column;
  min-height: 100dvh;
  padding: 1.25rem 1rem 2rem;
  max-width: 600px;
  margin: 0 auto;
  animation: fadeIn 0.3s ease;
}

.screen.active {
  display: flex;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Typography ────────────────────────────────────────────────────────── */
h1, h2, h3 { font-weight: 800; letter-spacing: -0.02em; }
h1 { font-size: clamp(1.8rem, 6vw, 2.5rem); }
h2 { font-size: clamp(1.1rem, 4vw, 1.4rem); }
h3 { font-size: clamp(0.95rem, 3vw, 1.1rem); font-weight: 700; }

.section-title   { color: var(--color-text); margin-bottom: 0.75rem; }
.subsection-title{ color: var(--color-text-muted); margin: 1.25rem 0 0.5rem; font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.06em; }

/* ─── Cards ─────────────────────────────────────────────────────────────── */
.section-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

/* ─── Buttons ───────────────────────────────────────────────────────────── */
button {
  font-family: var(--font-family);
  cursor: pointer;
  border: none;
  outline: none;
  transition: var(--transition);
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #9b85ff);
  color: #fff;
  font-size: 1.1rem;
  font-weight: 800;
  padding: 0.9rem 2rem;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 20px rgba(108,99,255,0.4);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.btn-primary:hover  { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(108,99,255,0.55); }
.btn-primary:active { transform: translateY(0); }

.btn-primary.btn-xl { font-size: 1.3rem; padding: 1.1rem 2.5rem; width: 100%; justify-content: center; }

.btn-secondary {
  background: var(--color-surface-2);
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 700;
  padding: 0.8rem 1.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  justify-content: center;
}
.btn-secondary:hover  { background: rgba(255,255,255,0.07); }

.btn-danger {
  background: rgba(255,85,85,0.1);
  color: var(--color-danger);
  font-weight: 700;
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255,85,85,0.3);
}
.btn-danger:hover { background: rgba(255,85,85,0.2); }

.icon-btn {
  background: var(--color-surface-2);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.icon-btn:hover { background: rgba(255,255,255,0.08); }

.text-btn {
  background: none;
  color: var(--color-primary-h);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}
.text-btn:hover { text-decoration: underline; }

/* ─── HOME ──────────────────────────────────────────────────────────────── */
.home-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.logo-icon {
  font-size: 2rem;
  filter: drop-shadow(0 0 12px var(--color-primary));
}

.logo-title {
  background: linear-gradient(135deg, var(--color-primary-h), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Selecció de taules */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}
.section-header .section-title { margin-bottom: 0; }
.table-actions { display: flex; gap: 0.5rem; align-items: center; }

.table-selector {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.5rem;
}

.table-btn {
  background: var(--color-surface-2);
  color: var(--color-text-muted);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.65rem 0;
  font-size: 0.95rem;
  font-weight: 800;
  text-align: center;
  transition: var(--transition);
}
.table-btn:hover   { border-color: var(--color-primary); color: var(--color-primary-h); }
.table-btn.selected {
  background: linear-gradient(135deg, var(--color-primary), #9b85ff);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 2px 12px rgba(108,99,255,0.45);
  transform: scale(1.06);
}

/* Modes de joc */
.modes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.mode-btn {
  background: var(--color-surface-2);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.9rem 0.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  transition: var(--transition);
}
.mode-btn:hover { border-color: var(--color-primary); }
.mode-btn.active {
  border-color: var(--color-primary);
  background: rgba(108,99,255,0.12);
  box-shadow: 0 0 0 3px rgba(108,99,255,0.2);
}

.mode-icon { font-size: 1.7rem; }
.mode-name { font-size: 0.9rem; font-weight: 800; }
.mode-desc { font-size: 0.72rem; color: var(--color-text-muted); text-align: center; }

/* Accions inici */
.home-actions {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding-top: 0.5rem;
}

/* ─── GAME HUD ───────────────────────────────────────────────────────────── */
.game-hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.5rem 0 0.75rem;
  flex-wrap: wrap;
}

.hud-mode-title {
  font-weight: 800;
  font-size: 1rem;
  color: var(--color-text-muted);
  flex: 1;
  text-align: center;
}

.hud-item {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

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

.hud-value {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--color-text);
}

.timer-value {
  color: var(--color-success);
  transition: color 0.3s;
}
.timer-warning { color: var(--color-danger) !important; animation: pulse 0.5s ease infinite alternate; }

@keyframes pulse { to { transform: scale(1.15); } }

.hud-lives { display: flex; gap: 0.15rem; font-size: 1.3rem; }
.heart { display: inline-block; transition: transform 0.2s; }

.streak-badge {
  text-align: center;
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--color-warning);
  min-height: 1.5rem;
  animation: fadeIn 0.3s;
}

.quick-stats {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
  font-weight: 700;
}
.quick-stats span { display: flex; align-items: center; gap: 0.25rem; }

/* ─── QUESTION AREA ──────────────────────────────────────────────────────── */
.question-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
}

.question-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 1.75rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-md);
  width: 100%;
  position: relative;
  overflow: hidden;
}

.question-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(108,99,255,0.06), transparent);
  pointer-events: none;
}

.question-text {
  font-size: clamp(2.2rem, 10vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #fff, var(--color-primary-h));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  width: 100%;
}

.option-btn {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1rem;
  font-size: clamp(1.3rem, 5vw, 1.8rem);
  font-weight: 900;
  color: var(--color-text);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
@media (hover: hover) {
  .option-btn:hover:not(:disabled) {
    border-color: var(--color-primary);
    background: rgba(108,99,255,0.1);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(108,99,255,0.3);
  }
}
.option-btn:active:not(:disabled) { transform: translateY(0); }

.option-btn.btn-correct {
  background: rgba(67,217,142,0.15);
  border-color: var(--color-success);
  color: var(--color-success);
  animation: correct-pop 0.35s ease;
}
.option-btn.btn-wrong {
  background: rgba(255,85,85,0.15);
  border-color: var(--color-danger);
  color: var(--color-danger);
  animation: wrong-shake 0.35s ease;
}
.option-btn:disabled { cursor: not-allowed; opacity: 0.6; }

@keyframes correct-pop  { 0%,100%{transform:scale(1)} 50%{transform:scale(1.07)} }
@keyframes wrong-shake  { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-6px)} 75%{transform:translateX(6px)} }

/* ─── MEMORY BOARD ───────────────────────────────────────────────────────── */
.memory-hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.5rem 0 1rem;
}

.memory-board {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.6rem;
  flex: 1;
  align-content: center;
}

.memory-card {
  background: transparent;
  border: none;
  aspect-ratio: 1 / 1.2;
  perspective: 800px;
  cursor: pointer;
  border-radius: var(--radius-md);
}

.card-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.45s cubic-bezier(0.4,0,0.2,1);
  border-radius: var(--radius-md);
}

.memory-card.flipped .card-inner,
.memory-card.matched .card-inner {
  transform: rotateY(180deg);
}

.card-front, .card-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: clamp(1rem, 3.5vw, 1.4rem);
  box-shadow: var(--shadow-sm);
}

.card-front {
  background: linear-gradient(135deg, var(--color-primary), #9b85ff);
  color: rgba(255,255,255,0.7);
  font-size: 1.5rem;
  border: 2px solid rgba(255,255,255,0.15);
}

.card-back {
  background: var(--color-surface);
  border: 2px solid var(--color-memory);
  color: var(--color-memory);
  transform: rotateY(180deg);
  font-size: clamp(0.8rem, 3vw, 1.1rem);
  text-align: center;
  padding: 0.25rem;
}

.memory-card.matched .card-back {
  background: rgba(67,217,142,0.12);
  border-color: var(--color-success);
  color: var(--color-success);
  animation: matched-glow 0.5s ease;
}

@keyframes matched-glow {
  0%   { transform: rotateY(180deg) scale(1); }
  50%  { transform: rotateY(180deg) scale(1.1); }
  100% { transform: rotateY(180deg) scale(1); }
}

/* ─── RESULTS ────────────────────────────────────────────────────────────── */
.results-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  text-align: center;
  gap: 1rem;
  padding: 1rem 0;
}

.results-trophy { font-size: 4rem; animation: trophy-bounce 0.6s ease; }
@keyframes trophy-bounce { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-12px)} }

.results-title { font-size: clamp(1.1rem, 4vw, 1.5rem); }

.results-record {
  background: linear-gradient(135deg, var(--color-warning), #ffdd57);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.3rem;
  font-weight: 900;
  animation: pulse 0.6s ease infinite alternate;
}

.results-score {
  font-size: clamp(2rem, 8vw, 3rem);
  font-weight: 900;
  background: linear-gradient(135deg, var(--color-primary-h), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.results-details {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  font-weight: 700;
}

.results-actions {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  width: 100%;
  margin-top: 0.5rem;
}

/* ─── PROGRESS ───────────────────────────────────────────────────────────── */
.progress-container {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.progress-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}
.progress-header .section-title { margin-bottom: 0; }

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
  margin-bottom: 0.25rem;
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.stat-label { font-size: 0.75rem; color: var(--color-text-muted); font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; }
.stat-value { font-size: 1.25rem; font-weight: 900; }

.tables-progress { display: flex; flex-direction: column; gap: 0.5rem; }

.table-progress-row {
  display: grid;
  grid-template-columns: 60px 1fr 60px;
  align-items: center;
  gap: 0.75rem;
}

.table-label { font-size: 0.85rem; font-weight: 800; color: var(--color-text-muted); }

.progress-bar-wrap {
  background: var(--color-surface);
  border-radius: var(--radius-full);
  height: 10px;
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
  border-radius: var(--radius-full);
  transition: width 0.6s cubic-bezier(0.4,0,0.2,1);
  min-width: 2px;
}

.table-accuracy { font-size: 0.8rem; font-weight: 800; text-align: right; color: var(--color-text-muted); }
.table-accuracy.mastered { color: var(--color-success); }

.progress-actions { margin-top: auto; padding-top: 1rem; display: flex; justify-content: center; }

/* ─── TOAST ──────────────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-surface);
  color: var(--color-text);
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 800;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  z-index: 9999;
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
  pointer-events: none;
  max-width: 90vw;
  text-align: center;
}
.toast-visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}
.toast-success { border-color: var(--color-success); color: var(--color-success); }
.toast-error   { border-color: var(--color-danger);  color: var(--color-danger);  }
.toast-info    { border-color: var(--color-primary-h); }

/* ─── FLOATING EMOJI ─────────────────────────────────────────────────────── */
.floating-emoji {
  position: absolute;
  font-size: 2rem;
  pointer-events: none;
  z-index: 9998;
  animation: float-up 0.9s ease forwards;
  transform: translateX(-50%);
  user-select: none;
}

@keyframes float-up {
  0%   { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }
  80%  { opacity: 1; transform: translateX(-50%) translateY(-70px) scale(1.2); }
  100% { opacity: 0; transform: translateX(-50%) translateY(-90px) scale(0.8); }
}

/* ─── Responsive ─────────────────────────────────────────────────────────── */
@media (min-width: 480px) {
  .table-selector { grid-template-columns: repeat(5, 1fr); }
  .memory-board   { grid-template-columns: repeat(4, 1fr); gap: 0.8rem; }
}

@media (max-width: 360px) {
  .table-selector { grid-template-columns: repeat(5, 1fr); gap: 0.35rem; }
  .table-btn { font-size: 0.85rem; padding: 0.55rem 0; }
  .modes-grid { gap: 0.5rem; }
  .memory-board { grid-template-columns: repeat(4, 1fr); gap: 0.4rem; }
  .option-btn { font-size: 1.2rem; padding: 0.8rem; }
}

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