:root {
  --bg:          #0c1120;
  --bg-raised:   #111827;
  --bg-elevated: #1a2236;
  --bg-input:    #161d2e;

  --border:      rgba(255,255,255,0.07);
  --border-mid:  rgba(255,255,255,0.11);
  --border-hi:   rgba(255,255,255,0.18);

  --text:        #eef2ff;
  --text-muted:  #7b8fae;
  --text-faint:  #3d4f6b;

  --green:       #22c55e;
  --green-dim:   rgba(34,197,94,0.12);
  --green-line:  rgba(34,197,94,0.22);

  --blue-tg:     #2481cc;

  --r4:  4px;
  --r8:  8px;
  --r12: 12px;
  --r16: 16px;
  --r24: 24px;
  --r999: 999px;

  --font: 'Inter', system-ui, -apple-system, sans-serif;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  overflow-x: hidden;
  font-size: 15px;
}

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { display: block; max-width: 100%; }
button, input { font: inherit; border: none; background: none; outline: none; cursor: pointer; }

.page { display: none; min-height: 100vh; }
.page.active { display: flex; flex-direction: column; }

/* Toast */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  translate: -50% 12px;
  opacity: 0;
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-mid);
  border-radius: var(--r999);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  box-shadow: 0 16px 48px rgba(0,0,0,0.5);
  transition: translate 0.35s var(--spring), opacity 0.25s var(--ease);
  z-index: 200;
  white-space: nowrap;
}
.toast.show {
  translate: -50% 0;
  opacity: 1;
}
.toast-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  flex-shrink: 0;
}

/* Scrollbar */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-mid); border-radius: 2px; }

/* ─── MODAL DE RECOMPENSA ────────────────────────── */

.reward-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.reward-overlay.show {
  opacity: 1;
  pointer-events: all;
}

.reward-modal {
  width: 100%;
  max-width: 400px;
  background: var(--bg-raised);
  border: 1px solid var(--border-mid);
  border-radius: var(--r16);
  padding: 32px 28px 28px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 20px;
  box-shadow: 0 32px 80px rgba(0,0,0,0.6);
  translate: 0 16px;
  transition: translate 0.35s cubic-bezier(0.34,1.56,0.64,1);
}

.reward-overlay.show .reward-modal {
  translate: 0 0;
}

.reward-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 28px;
  height: 28px;
  border-radius: var(--r8);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}

.reward-close:hover { color: var(--text); border-color: var(--border-mid); }

.reward-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
}

.reward-icon-wrap {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: 4px;
  background: var(--bg-elevated);
  border: 2px solid var(--border-mid);
}

.reward-unlocked-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--green);
}

.reward-achiev-name {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}

.reward-xp {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
}

.reward-divider {
  height: 1px;
  background: var(--border);
}

.reward-prize {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 6px;
}

.reward-prize-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.reward-prize-name {
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}

.reward-prize-sub {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.reward-code-wrap {
  margin-top: 6px;
  padding: 10px 24px;
  background: var(--bg-elevated);
  border: 2px dashed var(--border-mid);
  border-radius: var(--r8);
}

.reward-code {
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--text);
}

.reward-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  border-radius: var(--r8);
  font-size: 0.9375rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: #0c1120;
  background: var(--green);
  transition: filter 0.15s, transform 0.1s;
}

.reward-cta:hover { filter: brightness(1.08); }
.reward-cta:active { transform: scale(0.99); }