/* ===========================
   RESET & BASE
=========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0f1117;
  --bg2: #161b26;
  --bg3: #1e2535;
  --surface: #1e2535;
  --surface2: #252d3d;
  --border: rgba(255,255,255,0.07);
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --primary-glow: rgba(59,130,246,0.25);
  --green: #22c55e;
  --red: #ef4444;
  --yellow: #f59e0b;
  --text: #f1f5f9;
  --text2: #94a3b8;
  --text3: #64748b;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
  --sidebar-w: 240px;
}

body.light {
  --bg: #f0f4ff;
  --bg2: #e8edf8;
  --bg3: #dde4f5;
  --surface: #ffffff;
  --surface2: #f1f5ff;
  --border: rgba(0,0,0,0.08);
  --text: #1e293b;
  --text2: #475569;
  --text3: #94a3b8;
  --shadow: 0 4px 24px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.15);
}

html { font-size: 15px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

/* ===========================
   SCREENS
=========================== */
.screen { display: none; min-height: 100vh; }
.screen.active { display: flex; }

/* ===========================
   AUTH
=========================== */
#auth-screen {
  justify-content: center;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

.auth-bg { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.auth-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.18;
  animation: blobFloat 8s ease-in-out infinite;
}
.blob1 {
  width: 500px; height: 500px;
  background: var(--primary);
  top: -150px; left: -150px;
  animation-delay: 0s;
}
.blob2 {
  width: 400px; height: 400px;
  background: #8b5cf6;
  bottom: -100px; right: -100px;
  animation-delay: 4s;
}
@keyframes blobFloat {
  0%,100% { transform: translate(0,0) scale(1); }
  50% { transform: translate(30px,20px) scale(1.1); }
}

.auth-container {
  position: relative;
  z-index: 2;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 48px 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.5s cubic-bezier(0.4,0,0.2,1);
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(32px); }
  to { opacity: 1; transform: translateY(0); }
}

.auth-logo {
  text-align: center;
  margin-bottom: 36px;
}
.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px; height: 64px;
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  border-radius: 18px;
  font-size: 28px;
  color: #fff;
  margin-bottom: 16px;
  box-shadow: 0 8px 32px var(--primary-glow);
}
.auth-logo h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text);
}
.plus { color: var(--primary); }
.auth-logo p { color: var(--text2); font-size: 0.9rem; margin-top: 4px; }

.auth-form { display: none; flex-direction: column; gap: 14px; }
.auth-form.active { display: flex; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.auth-form h2 { font-size: 1.4rem; font-weight: 700; margin-bottom: 4px; }
.form-desc { color: var(--text2); font-size: 0.875rem; margin-bottom: 8px; }

.input-group {
  position: relative;
  display: flex;
  align-items: center;
}
.input-group i {
  position: absolute;
  left: 16px;
  color: var(--text3);
  font-size: 0.9rem;
}
.input-group input {
  width: 100%;
  padding: 14px 48px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.9rem;
  font-family: 'Inter', sans-serif;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.input-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}
.input-group input::placeholder { color: var(--text3); }
.toggle-pw {
  position: absolute;
  right: 14px;
  background: none;
  border: none;
  color: var(--text3);
  cursor: pointer;
  padding: 4px;
  transition: color var(--transition);
}
.toggle-pw:hover { color: var(--text); }

.auth-error {
  font-size: 0.82rem;
  color: var(--red);
  min-height: 18px;
  text-align: center;
}

.btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 24px;
  background: linear-gradient(135deg, var(--primary), #6366f1);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px var(--primary-glow);
}
.btn-primary:hover { opacity: 0.92; transform: translateY(-1px); box-shadow: 0 6px 24px var(--primary-glow); }
.btn-primary:active { transform: translateY(0); }
.btn-primary.full { width: 100%; margin-top: 8px; }

.btn-secondary {
  padding: 14px 24px;
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.btn-secondary:hover { background: var(--primary-glow); }

.btn-link {
  background: none;
  border: none;
  color: var(--text2);
  font-size: 0.85rem;
  cursor: pointer;
  text-align: center;
  transition: color var(--transition);
  padding: 4px;
}
.btn-link:hover { color: var(--primary); }

.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text3);
  font-size: 0.8rem;
}
.auth-divider::before, .auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ===========================
   APP LAYOUT
=========================== */
#app-screen {
  flex-direction: column;
}

.sidebar {
  position: fixed;
  left: 0; top: 0; bottom: 0;
  width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  z-index: 100;
  transition: transform var(--transition), background var(--transition);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px 28px;
  font-size: 1.3rem;
  font-weight: 800;
}
.sidebar-logo i {
  font-size: 1.5rem;
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sidebar-logo b { color: var(--primary); }

.nav-links { list-style: none; display: flex; flex-direction: column; gap: 6px; flex: 1; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text2);
  font-size: 0.9rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}
.nav-item:hover { background: var(--bg2); color: var(--text); }
.nav-item.active { background: var(--primary-glow); color: var(--primary); font-weight: 600; }
.nav-item i { width: 20px; text-align: center; }

.sidebar-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.theme-toggle {
  flex: 0;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text2);
  cursor: pointer;
  transition: all var(--transition);
}
.theme-toggle:hover { color: var(--primary); border-color: var(--primary); }

.logout-btn {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text2);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition);
}
.logout-btn:hover { border-color: var(--red); color: var(--red); background: rgba(239,68,68,0.08); }

/* Mobile Header */
.mobile-header {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 60px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 200;
}
.menu-btn, .mobile-logout {
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 8px;
}
.mobile-logo { font-size: 1.2rem; font-weight: 800; }
.mobile-logo b { color: var(--primary); }

/* Main Content */
.main-content {
  margin-left: var(--sidebar-w);
  padding: 32px;
  min-height: 100vh;
  background: var(--bg);
  transition: margin var(--transition);
}

.tab-content { display: none; animation: fadeIn 0.3s ease; }
.tab-content.active { display: block; }

/* Page Header */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 16px;
}
.page-header h2 { font-size: 1.6rem; font-weight: 700; }
.subtitle { color: var(--text2); font-size: 0.875rem; margin-top: 4px; }

/* Month Selector */
.month-selector {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-weight: 600;
  font-size: 0.9rem;
}
.month-selector button {
  background: none;
  border: none;
  color: var(--text2);
  cursor: pointer;
  transition: color var(--transition);
  padding: 2px 6px;
}
.month-selector button:hover { color: var(--primary); }
.month-selector.small { padding: 6px 12px; font-size: 0.82rem; }

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 18px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  border-radius: var(--radius) var(--radius) 0 0;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }

.card-balance::before { background: linear-gradient(90deg, var(--primary), #6366f1); }
.card-income::before { background: linear-gradient(90deg, var(--green), #10b981); }
.card-expense::before { background: linear-gradient(90deg, var(--red), #f97316); }
.card-savings::before { background: linear-gradient(90deg, var(--yellow), #f97316); }

.card-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}
.card-balance .card-icon { background: rgba(59,130,246,0.15); color: var(--primary); }
.card-income .card-icon { background: rgba(34,197,94,0.15); color: var(--green); }
.card-expense .card-icon { background: rgba(239,68,68,0.15); color: var(--red); }
.card-savings .card-icon { background: rgba(245,158,11,0.15); color: var(--yellow); }

.card-info span { color: var(--text2); font-size: 0.82rem; font-weight: 500; }
.card-info h3 { font-size: 1.4rem; font-weight: 700; margin-top: 4px; }

/* Dashboard Bottom */
.dashboard-bottom {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 20px;
}

.recent-transactions, .mini-chart-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.recent-transactions h3, .mini-chart-wrap h3 { font-size: 1rem; font-weight: 600; margin-bottom: 18px; }

/* Transaction List */
.tx-list { display: flex; flex-direction: column; gap: 10px; }

.tx-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: background var(--transition);
  animation: fadeIn 0.3s ease;
}
.tx-item:hover { background: var(--surface2); }

.tx-icon {
  width: 40px; height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}
.tx-icon.income { background: rgba(34,197,94,0.15); color: var(--green); }
.tx-icon.expense { background: rgba(239,68,68,0.15); color: var(--red); }

.tx-info { flex: 1; min-width: 0; }
.tx-info strong { display: block; font-size: 0.9rem; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tx-info small { color: var(--text2); font-size: 0.78rem; }

.tx-amount {
  font-size: 0.95rem;
  font-weight: 700;
  white-space: nowrap;
}
.tx-amount.income { color: var(--green); }
.tx-amount.expense { color: var(--red); }

.tx-actions { display: flex; gap: 6px; }
.tx-btn {
  width: 32px; height: 32px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text2);
  cursor: pointer;
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.tx-btn.edit:hover { color: var(--primary); border-color: var(--primary); background: var(--primary-glow); }
.tx-btn.delete:hover { color: var(--red); border-color: var(--red); background: rgba(239,68,68,0.1); }

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text3);
}
.empty-state i { font-size: 2.5rem; margin-bottom: 12px; display: block; }
.empty-state p { font-size: 0.9rem; }

/* Filters */
.filters {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  align-items: center;
}
.search-wrap {
  position: relative;
  flex: 1;
  min-width: 200px;
}
.search-wrap i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text3);
  font-size: 0.85rem;
}
.search-wrap input {
  width: 100%;
  padding: 11px 16px 11px 40px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.875rem;
  font-family: 'Inter', sans-serif;
  outline: none;
  transition: border-color var(--transition);
}
.search-wrap input:focus { border-color: var(--primary); }
.filters select {
  padding: 11px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.875rem;
  font-family: 'Inter', sans-serif;
  outline: none;
  cursor: pointer;
  transition: border-color var(--transition);
}
.filters select:focus { border-color: var(--primary); }

/* Form Card */
.form-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 700px;
  box-shadow: var(--shadow);
}

.type-toggle {
  display: flex;
  gap: 12px;
  margin-bottom: 28px;
  background: var(--bg2);
  border-radius: var(--radius-sm);
  padding: 6px;
}
.type-btn {
  flex: 1;
  padding: 12px;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  color: var(--text2);
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.type-btn.active {
  color: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
#btn-receita.active { background: var(--green); }
#btn-despesa.active { background: var(--red); }
.type-btn:not(.active):hover { background: var(--bg3); color: var(--text); }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label { font-size: 0.82rem; font-weight: 600; color: var(--text2); text-transform: uppercase; letter-spacing: 0.5px; }
.form-group input, .form-group select {
  padding: 13px 16px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.9rem;
  font-family: 'Inter', sans-serif;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus, .form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}
.form-group input::placeholder { color: var(--text3); }

.btn-cancel {
  display: block;
  width: 100%;
  padding: 13px;
  margin-top: 10px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text2);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-cancel:hover { border-color: var(--red); color: var(--red); }

/* Charts Grid */
.charts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.chart-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.chart-card h3 { font-size: 1rem; font-weight: 600; margin-bottom: 20px; }
.chart-card.full-width { grid-column: 1 / -1; }

/* Modal */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}
.modal-overlay.active { display: flex; animation: fadeIn 0.2s ease; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px 32px;
  max-width: 360px;
  width: 90%;
  text-align: center;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.3s ease;
}
.modal-icon {
  width: 64px; height: 64px;
  background: rgba(239,68,68,0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--red);
  margin: 0 auto 20px;
}
.modal h3 { font-size: 1.2rem; margin-bottom: 8px; }
.modal p { color: var(--text2); font-size: 0.875rem; margin-bottom: 28px; }
.modal-btns { display: flex; gap: 12px; }
.btn-cancel-modal {
  flex: 1;
  padding: 13px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-cancel-modal:hover { background: var(--bg3); }
.btn-confirm-delete {
  flex: 1;
  padding: 13px;
  background: var(--red);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition);
}
.btn-confirm-delete:hover { opacity: 0.85; }

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--green);
  border-radius: var(--radius-sm);
  padding: 14px 20px;
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  transform: translateX(120%);
  transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
  max-width: 320px;
}
.toast.show { transform: translateX(0); }
.toast.error { border-left-color: var(--red); }

/* Loading */
.loading-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  z-index: 3000;
  align-items: center;
  justify-content: center;
}
.loading-overlay.active { display: flex; }
.spinner {
  width: 48px; height: 48px;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--text3); }

/* ===========================
   RESPONSIVE
=========================== */
@media (max-width: 1100px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .mobile-header { display: flex; }
  .main-content { margin-left: 0; padding: 80px 16px 24px; }
  .dashboard-bottom { grid-template-columns: 1fr; }
  .charts-grid { grid-template-columns: 1fr; }
  .chart-card.full-width { grid-column: auto; }
}

@media (max-width: 600px) {
  .auth-container { padding: 32px 24px; margin: 16px; }
  .cards-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .card { padding: 16px; gap: 12px; }
  .card-info h3 { font-size: 1.1rem; }
  .form-grid { grid-template-columns: 1fr; }
  .filters { flex-direction: column; }
  .filters select, .search-wrap { width: 100%; }
}

@media (max-width: 400px) {
  .cards-grid { grid-template-columns: 1fr; }
  .page-header { flex-direction: column; align-items: flex-start; }
}