:root {
  --lime: #A4F000;
  --teal: #003F3A;
  --dark: #0D0D0D;
  --teal-mid: #005a52;
  --teal-card: #012e2a;
  --lime-dark: #8acc00;
  --white: #ffffff;
  --muted: rgba(255,255,255,0.45);
  --border: rgba(164,240,0,0.2);
  --card-bg: rgba(255,255,255,0.04);
  --card-border: rgba(255,255,255,0.07);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--teal);
  color: var(--white);
  min-height: 100vh;
}

/* ─── LOGIN ─────────────────────────────────── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, var(--lime) 50%, var(--teal) 50%);
  padding: 20px;
}

.login-card {
  background: var(--dark);
  border-radius: 24px;
  padding: 44px 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.6);
}

.login-logo { text-align: center; margin-bottom: 36px; }
.login-logo h1 {
  font-size: 3.4rem;
  font-weight: 900;
  color: var(--lime);
  letter-spacing: -2px;
  text-transform: uppercase;
  line-height: 1;
}
.login-logo p {
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-top: 6px;
}

.field { margin-bottom: 20px; }
.field label {
  display: block;
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 8px;
}
.field select,
.field input[type="text"],
.field input[type="password"] {
  width: 100%;
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--border);
  color: var(--white);
  border-radius: 12px;
  padding: 13px 16px;
  font-size: 1rem;
  transition: border-color .2s, background .2s;
}
.field select:focus,
.field input[type="text"]:focus,
.field input[type="password"]:focus {
  border-color: var(--lime);
  background: rgba(255,255,255,0.1);
  outline: none;
  box-shadow: 0 0 0 3px rgba(164,240,0,0.12);
}
.field select option { background: #111; }

.alert-err {
  background: rgba(255,90,90,0.12);
  border: 1px solid rgba(255,90,90,0.4);
  color: #ff7070;
  border-radius: 10px;
  padding: 11px 15px;
  font-size: 0.88rem;
  margin-top: 14px;
  display: none;
}

/* ─── BUTTONS ────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border: none;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all .2s;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--lime);
  color: var(--teal);
  padding: 14px 24px;
}
.btn-primary:hover { background: var(--lime-dark); transform: translateY(-1px); }
.btn-primary.full { width: 100%; }
.btn-primary.lg { font-size: 1rem; padding: 16px 32px; }

.btn-outline {
  background: transparent;
  color: var(--lime);
  border: 2px solid var(--lime);
  padding: 10px 18px;
}
.btn-outline:hover { background: var(--lime); color: var(--teal); }

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid rgba(255,255,255,0.18);
  padding: 8px 16px;
  font-size: 0.78rem;
}
.btn-ghost:hover { border-color: var(--lime); color: var(--lime); }

.btn-danger {
  background: transparent;
  color: #ff7070;
  border: 2px solid #ff7070;
  padding: 8px 16px;
}
.btn-danger:hover { background: #ff7070; color: white; }

.btn-redeem {
  background: var(--lime);
  color: var(--teal);
  padding: 16px 44px;
  font-size: 1.05rem;
  border-radius: 14px;
  box-shadow: 0 8px 32px rgba(164,240,0,0.35);
}
.btn-redeem:hover { transform: translateY(-2px); box-shadow: 0 14px 40px rgba(164,240,0,0.45); }

/* ─── NAVBAR ─────────────────────────────────── */
.app-nav {
  background: var(--dark);
  border-bottom: 2px solid var(--lime);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}
.nav-brand {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--lime);
  letter-spacing: -1px;
  text-transform: uppercase;
}
.nav-brand span {
  font-size: 0.65rem;
  letter-spacing: 3px;
  color: var(--muted);
  font-weight: 600;
  margin-left: 8px;
  vertical-align: middle;
}
.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--lime);
  color: var(--teal);
  font-weight: 900;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-name { font-weight: 600; font-size: 0.95rem; }
.balance-badge {
  background: var(--lime);
  color: var(--teal);
  font-weight: 900;
  font-size: 1rem;
  padding: 5px 16px;
  border-radius: 20px;
  letter-spacing: -0.5px;
}

/* ─── LAYOUT ─────────────────────────────────── */
.app-wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 30px 20px 60px;
}

/* ─── SECTION TITLE ──────────────────────────── */
.sec-title {
  font-size: 0.7rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--lime);
  font-weight: 700;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  margin-top: 32px;
}
.sec-title:first-child { margin-top: 0; }

/* ─── TASK CARD ──────────────────────────────── */
.task-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 16px 20px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: border-color .2s, background .2s;
}
.task-card:hover { border-color: var(--border); background: rgba(164,240,0,0.04); }
.task-card.faded { opacity: 0.6; }

.task-info { flex: 1; min-width: 0; }
.task-info h4 {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.task-info small { color: var(--muted); font-size: 0.78rem; }

.task-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.task-value {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--lime);
  letter-spacing: -0.5px;
}

/* ─── BADGES ─────────────────────────────────── */
.badge {
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 20px;
}
.badge-progress {
  background: rgba(255,200,0,0.12);
  color: #ffc800;
  border: 1px solid rgba(255,200,0,0.3);
}
.badge-done {
  background: rgba(164,240,0,0.12);
  color: var(--lime);
  border: 1px solid var(--border);
}
.badge-review {
  background: rgba(255,150,0,0.12);
  color: #ff9600;
  border: 1px solid rgba(255,150,0,0.3);
}

/* ─── REDEEM BANNER ──────────────────────────── */
.redeem-banner {
  background: linear-gradient(135deg, rgba(164,240,0,0.1), rgba(0,63,58,0.6));
  border: 2px solid var(--lime);
  border-radius: 18px;
  padding: 30px;
  text-align: center;
  margin-bottom: 32px;
}
.redeem-banner h3 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--lime);
  margin-bottom: 6px;
}
.redeem-banner p { color: var(--muted); margin-bottom: 22px; }

/* ─── STAT CARDS ─────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 30px;
}
.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px 16px;
  text-align: center;
}
.stat-value {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--lime);
  line-height: 1;
}
.stat-label {
  font-size: 0.68rem;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 6px;
}

/* ─── TABS ───────────────────────────────────── */
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 24px;
}
.tab-btn {
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  color: var(--muted);
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 11px 18px;
  cursor: pointer;
  transition: all .2s;
  margin-bottom: -1px;
}
.tab-btn.active { color: var(--lime); border-bottom-color: var(--lime); }
.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* ─── TASK FORM (admin) ──────────────────────── */
.task-form {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  margin-bottom: 24px;
}
.task-form input[type="text"],
.task-form input[type="email"],
.task-form input[type="number"] {
  width: 100%;
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--border);
  color: var(--white);
  border-radius: 10px;
  padding: 11px 14px;
  font-size: 0.95rem;
  margin-bottom: 12px;
  transition: border-color .2s;
}
.task-form input::placeholder { color: rgba(255,255,255,0.25); }
.task-form input:focus { border-color: var(--lime); outline: none; background: rgba(255,255,255,0.09); }
.form-row { display: flex; gap: 10px; align-items: flex-start; }
.form-row .btn { flex-shrink: 0; padding: 13px 22px; }

/* ─── USER BALANCE CARD ──────────────────────── */
.user-balance-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 18px 22px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.user-balance-card h4 { color: var(--lime); font-weight: 700; margin-bottom: 2px; }
.user-balance-card small { color: var(--muted); font-size: 0.78rem; }

/* ─── EMPTY STATE ────────────────────────────── */
.empty {
  text-align: center;
  padding: 36px 20px;
  color: var(--muted);
}
.empty-icon { font-size: 2.5rem; margin-bottom: 8px; }

/* ─── MODAL ──────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.82);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-overlay.open { display: flex; }
.modal-box {
  background: #0e1c1a;
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 36px 32px;
  max-width: 380px;
  width: 100%;
  text-align: center;
  animation: pop .2s ease;
}
.modal-box h3 { color: var(--lime); font-size: 1.15rem; font-weight: 800; margin-bottom: 8px; }
.modal-box p { color: var(--muted); font-size: 0.9rem; margin-bottom: 10px; }
.modal-value { font-size: 2.6rem; font-weight: 900; color: var(--lime); margin-bottom: 24px; line-height: 1; }
.modal-actions { display: flex; gap: 10px; }
.modal-actions .btn { flex: 1; }
@keyframes pop { from { transform: scale(.9); opacity: 0; } to { transform: scale(1); opacity: 1; } }

/* ─── TOAST ──────────────────────────────────── */
#toast-wrap {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast {
  background: var(--lime);
  color: var(--teal);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 13px 20px;
  border-radius: 12px;
  box-shadow: 0 6px 24px rgba(164,240,0,0.3);
  animation: slideIn .25s ease;
}
.toast.err { background: #ff7070; color: white; box-shadow: 0 6px 24px rgba(255,112,112,0.3); }
@keyframes slideIn { from { transform: translateX(80px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ─── SCROLLBAR ──────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--teal); }
::-webkit-scrollbar-thumb { background: rgba(164,240,0,0.4); border-radius: 3px; }

/* ─── RESPONSIVE ─────────────────────────────── */
@media (max-width: 600px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr) !important; }
  .task-card { flex-wrap: wrap; }
  .task-right { width: 100%; justify-content: space-between; }
  .login-card { padding: 32px 24px; }
  .app-nav { padding: 12px 16px; }
  .nav-brand { font-size: 1.2rem; }
  .nav-name { display: none; }
  .form-row { flex-direction: column; }
  .form-row .btn { width: 100%; }
  .modal-box { padding: 28px 22px; }
  .app-wrap { padding: 20px 14px 60px; }

  /* Tabs: scroll horizontal si no caben */
  .tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 1px;
  }
  .tabs::-webkit-scrollbar { display: none; }
  .tab-btn {
    white-space: nowrap;
    padding: 11px 12px;
    font-size: 0.67rem;
    letter-spacing: 1px;
  }

  /* Balance card apilado en móvil */
  .user-balance-card { flex-wrap: wrap; gap: 12px; }

  /* Redeem banner más compacto */
  .redeem-banner { padding: 22px 16px; }
  .redeem-banner h3 { font-size: 1.1rem; }
}