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

[hidden] { display: none !important; }

:root {
  --primary: #667eea;
  --primary-dark: #5568d3;
  --accent: #764ba2;
  --bg: #f4f6fb;
  --panel-bg: #ffffff;
  --sidebar-bg: #1a202c;
  --sidebar-hover: #2d3748;
  --sidebar-active: #667eea;
  --text: #2d3748;
  --muted: #718096;
  --border: #e2e8f0;
  --danger: #e53e3e;
  --success: #38a169;
}

[data-theme="dark"] {
  --primary: #818cf8;
  --primary-dark: #6366f1;
  --accent: #a78bfa;
  --bg: #0f172a;
  --panel-bg: #1e293b;
  --sidebar-bg: #020617;
  --sidebar-hover: #1e293b;
  --sidebar-active: #6366f1;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #334155;
  --danger: #f87171;
  --success: #4ade80;
}

[data-theme="rosa"] {
  --primary: #ec4899;
  --primary-dark: #db2777;
  --accent: #f472b6;
  --bg: #fff1f7;
  --panel-bg: #ffffff;
  --sidebar-bg: #831843;
  --sidebar-hover: #9d174d;
  --sidebar-active: #ec4899;
  --text: #500724;
  --muted: #9d174d;
  --border: #fbcfe8;
  --danger: #e11d48;
  --success: #10b981;
}

[data-theme="verde"] {
  --primary: #10b981;
  --primary-dark: #059669;
  --accent: #34d399;
  --bg: #f0fdf4;
  --panel-bg: #ffffff;
  --sidebar-bg: #064e3b;
  --sidebar-hover: #065f46;
  --sidebar-active: #10b981;
  --text: #022c22;
  --muted: #047857;
  --border: #bbf7d0;
  --danger: #dc2626;
  --success: #16a34a;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.app {
  display: flex;
  min-height: 100vh;
}

/* SIDEBAR */
.sidebar {
  width: 240px;
  background: var(--sidebar-bg);
  color: white;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px 22px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 12px;
}

.logo-icon {
  font-size: 1.8rem;
}

.logo-text {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.menu {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.menu-item {
  background: transparent;
  color: #cbd5e0;
  border: none;
  padding: 12px 14px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  font-size: 0.95rem;
  font-family: inherit;
  font-weight: 500;
  text-align: left;
  transition: background 0.15s, color 0.15s;
}

.menu-item:hover {
  background: var(--sidebar-hover);
  color: white;
}

.menu-item.active {
  background: var(--sidebar-active);
  color: white;
}

.menu-icon {
  font-size: 1.2rem;
  width: 24px;
  text-align: center;
}

/* CONTENT */
.content {
  flex: 1;
  padding: 32px 40px;
  overflow-y: auto;
}

.view {
  display: none;
  animation: fadeIn 0.25s ease;
}

.view.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.view-header {
  margin-bottom: 24px;
}

.view-header h1 {
  font-size: 1.8rem;
  margin-bottom: 4px;
}

.view-header p {
  color: var(--muted);
  font-size: 0.95rem;
}

/* CARDS */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.card {
  background: var(--panel-bg);
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.card .label {
  font-size: 0.8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card .value {
  font-size: 1.7rem;
  font-weight: 700;
}

.card.total .value { color: var(--danger); }
.card.month .value { color: var(--primary); }
.card.avg .value { color: var(--accent); }
.card.count .value { color: var(--text); }

/* PANELS */
.panel {
  background: var(--panel-bg);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border);
  margin-bottom: 16px;
}

.panel h2 {
  font-size: 1.1rem;
  margin-bottom: 16px;
  color: var(--text);
}

/* FORM */
form .row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text);
  font-weight: 500;
}

label.inline {
  flex-direction: row;
  align-items: center;
  gap: 10px;
  flex: 1;
}

label.inline select,
label.inline input {
  flex: 1;
}

input,
select {
  padding: 10px 12px;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--panel-bg);
  color: var(--text);
  transition: border-color 0.15s;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--primary);
}

button {
  cursor: pointer;
  border: none;
  padding: 11px 20px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  transition: transform 0.1s, box-shadow 0.2s, background 0.15s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  width: 100%;
}

.btn-primary.small {
  width: auto;
  padding: 9px 16px;
  margin-top: 10px;
}

.btn-primary:hover {
  box-shadow: 0 4px 14px rgba(102, 126, 234, 0.4);
}

.btn-danger {
  background: #fed7d7;
  color: var(--danger);
}

.btn-danger:hover { background: #feb2b2; }

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

.btn-ghost:hover { background: #edf2f7; }

.button-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* FILTERS */
.filter-row {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

/* LIST */
ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.expense-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: #f7fafc;
  border-radius: 10px;
  border-left: 4px solid var(--primary);
  transition: transform 0.1s;
}

.expense-item:hover {
  transform: translateX(2px);
}

.expense-info { flex: 1; }
.expense-desc { font-weight: 600; margin-bottom: 4px; }
.expense-meta { font-size: 0.82rem; color: var(--muted); }
.expense-amount {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--danger);
  margin-right: 12px;
  white-space: nowrap;
}

.btn-delete {
  background: transparent;
  color: #a0aec0;
  padding: 6px 10px;
  font-size: 1.1rem;
}

.btn-delete:hover { background: #fed7d7; color: var(--danger); }

.empty {
  text-align: center;
  color: #a0aec0;
  padding: 30px 0;
  font-style: italic;
}

.empty.hidden { display: none; }

/* CATEGORIES */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.cat-card {
  background: #f7fafc;
  padding: 18px;
  border-radius: 12px;
  text-align: center;
  border: 1px solid var(--border);
}

.cat-card .cat-icon { font-size: 2rem; margin-bottom: 6px; }
.cat-card .cat-name { font-size: 0.85rem; color: var(--muted); margin-bottom: 6px; }
.cat-card .cat-amount { font-size: 1.3rem; font-weight: 700; color: var(--text); }
.cat-card .cat-percent { font-size: 0.75rem; color: var(--muted); margin-top: 4px; }

/* PROGRESS */
.progress-wrap { margin-top: 8px; }

.progress {
  width: 100%;
  height: 14px;
  background: var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width 0.4s ease;
  width: 0%;
}

.progress-bar.warn { background: linear-gradient(90deg, #f6ad55, #ed8936); }
.progress-bar.over { background: linear-gradient(90deg, #fc8181, var(--danger)); }

.progress-text {
  margin-top: 8px;
  font-size: 0.9rem;
  color: var(--muted);
}

.note {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* TOAST */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--sidebar-bg);
  color: white;
  padding: 12px 20px;
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.25s, transform 0.25s;
  pointer-events: none;
  z-index: 1000;
  font-size: 0.9rem;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* MENU TOGGLE (mobile) */
.menu-toggle {
  display: none;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  background: var(--sidebar-bg);
  color: white;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  font-size: 1.3rem;
  padding: 0;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: -260px;
    transition: left 0.25s ease;
    z-index: 50;
    height: 100vh;
  }

  .sidebar.open { left: 0; }

  .content { padding: 70px 20px 24px; }

  .menu-toggle { display: flex; align-items: center; justify-content: center; }

  form .row { grid-template-columns: 1fr; }

  .filter-row { flex-direction: column; }

  label.inline { width: 100%; }
}

/* AUTH SCREEN */
.auth-screen {
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 1000;
}

.auth-card {
  background: var(--panel-bg);
  border-radius: 16px;
  padding: 32px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
}

.auth-logo {
  text-align: center;
  margin-bottom: 24px;
}

.auth-logo-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: 8px;
}

.auth-logo h1 {
  font-size: 1.4rem;
  color: var(--text);
  margin-bottom: 4px;
}

.auth-subtitle {
  color: var(--muted);
  font-size: 0.9rem;
}

.auth-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg);
  padding: 4px;
  border-radius: 10px;
  margin-bottom: 20px;
}

.auth-tab {
  flex: 1;
  padding: 10px;
  background: transparent;
  border: none;
  border-radius: 8px;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s;
}

.auth-tab.active {
  background: var(--panel-bg);
  color: var(--primary);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.auth-form {
  display: none;
  flex-direction: column;
  gap: 14px;
}

.auth-form.active {
  display: flex;
}

.auth-error {
  color: var(--danger);
  font-size: 0.85rem;
  background: #fee;
  padding: 8px 12px;
  border-radius: 6px;
  margin: 0;
}

/* USER CHIP */
.user-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  margin-bottom: 12px;
  color: white;
  font-size: 0.85rem;
}

.user-chip-avatar {
  font-size: 1.1rem;
}

.user-chip-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.auth-hint {
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
  margin-bottom: 16px;
}

.users-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.users-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.users-list .user-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.users-list .user-name { font-weight: 600; color: var(--text); }
.users-list .user-meta { font-size: 0.8rem; color: var(--muted); }
.users-list .user-badge {
  font-size: 0.7rem;
  background: var(--primary);
  color: white;
  padding: 2px 8px;
  border-radius: 99px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.8rem;
  margin: 14px 0 4px;
}
.auth-divider::before,
.auth-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

.btn-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 16px;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s;
}
.btn-google:hover {
  background: var(--bg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.google-btn-wrap {
  display: flex;
  justify-content: center;
  margin-top: 4px;
  min-height: 44px;
}

.sidebar-logout {
  background: transparent;
  color: #cbd5e0;
  padding: 4px 8px;
  font-size: 1rem;
  border-radius: 6px;
  margin-left: auto;
  transition: background 0.15s, color 0.15s;
}
.sidebar-logout:hover { background: rgba(255,255,255,0.12); color: #fed7d7; }

/* MONTHS VIEW */
.month-card { padding: 20px 24px; }
.month-header { margin-bottom: 16px; }
.month-header h2 { font-size: 1.2rem; margin-bottom: 6px; color: var(--text); }
.month-stats {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--muted);
}
.month-stats strong { color: var(--primary); font-size: 1.05rem; }

.month-cats { display: flex; flex-direction: column; gap: 8px; }

.month-cat-row {
  display: grid;
  grid-template-columns: minmax(180px, 200px) 1fr 140px;
  gap: 12px;
  align-items: center;
  font-size: 0.88rem;
}
.month-cat-name { font-weight: 500; }
.month-cat-bar {
  height: 6px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
  display: block;
}
.month-cat-bar > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 99px;
}
.month-cat-amount { text-align: right; font-weight: 600; color: var(--text); }
.month-cat-amount small { color: var(--muted); font-weight: 400; }

@media (max-width: 640px) {
  .month-cat-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .month-cat-amount { text-align: left; }
}

.month-separator {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px 8px;
  margin-top: 8px;
  background: transparent;
  border-left: none;
  font-size: 0.9rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--border);
}
.month-separator:first-child { margin-top: 0; }
.month-separator-title { font-weight: 700; color: var(--text); }
.month-separator-total { font-weight: 600; }
.month-separator:hover { transform: none; }