/* ==============================
   CSS Variables & Reset
============================== */
:root {
  --bg:        #0f0f13;
  --bg2:       #17171e;
  --bg3:       #1f1f29;
  --border:    #2a2a38;
  --accent:    #e8c97e;
  --accent2:   #7ec9e8;
  --income:    #5cb87a;
  --expense:   #e8705c;
  --text:      #f0ede6;
  --muted:     #7a7890;
  --radius:    14px;
  --shadow:    0 4px 24px rgba(0,0,0,0.4);

  /* category colors */
  --c-food:    #f4a56a;
  --c-trans:   #7ec9e8;
  --c-shop:    #c97ef8;
  --c-bills:   #e8705c;
  --c-ent:     #5cb87a;
  --c-other:   #aaaaaa;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 15px;
  line-height: 1.6;
}

/* ==============================
   Header
============================== */
.header {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  font-size: 22px;
  color: var(--accent);
  line-height: 1;
}

.logo-text {
  font-family: 'DM Serif Display', serif;
  font-size: 22px;
  color: var(--text);
  letter-spacing: 0.02em;
}

.header-month {
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ==============================
   Container
============================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ==============================
   Summary Cards
============================== */
.summary-section {
  padding: 28px 0 0;
}

.cards-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 16px;
}

.card {
  border-radius: var(--radius);
  padding: 24px 28px;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s ease;
}

.card:hover { transform: translateY(-2px); }

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
}

.card--balance {
  background: linear-gradient(135deg, #1c1c2e, #22223a);
  border: 1px solid #35355a;
}
.card--balance::before { background: var(--accent); }

.card--income {
  background: linear-gradient(135deg, #152218, #1a2d1c);
  border: 1px solid #2a4030;
}
.card--income::before { background: var(--income); }

.card--expense {
  background: linear-gradient(135deg, #221818, #2d1a1a);
  border: 1px solid #3d2828;
}
.card--expense::before { background: var(--expense); }

.card-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 8px;
}

.card-amount {
  font-family: 'DM Serif Display', serif;
  font-size: 32px;
  line-height: 1.1;
  color: var(--text);
  margin-bottom: 4px;
  word-break: break-all;
}

.card--income .card-amount { color: var(--income); }
.card--expense .card-amount { color: var(--expense); }

.card-sub {
  font-size: 12px;
  color: var(--muted);
}

/* ==============================
   Main Layout
============================== */
.main-content {
  padding: 24px 0 60px;
}

.layout {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 20px;
  align-items: start;
}

/* ==============================
   Panel
============================== */
.panel {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 20px;
}

.panel-header {
  padding: 18px 22px 14px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.panel-title {
  font-family: 'DM Serif Display', serif;
  font-size: 18px;
  font-weight: 400;
  color: var(--text);
}

.panel-badge {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ==============================
   Toggle
============================== */
.toggle-group {
  display: flex;
  background: var(--bg3);
  border-radius: 8px;
  padding: 3px;
  gap: 2px;
}

.toggle-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.toggle-btn.active {
  background: var(--accent);
  color: #1a1500;
}

.toggle-btn:not(.active):hover {
  color: var(--text);
}

/* ==============================
   Form
============================== */
.form {
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.field-group.hidden { display: none; }

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.field input,
.field select {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  padding: 10px 14px;
  outline: none;
  transition: border-color 0.2s ease;
  width: 100%;
}

.field input:focus,
.field select:focus {
  border-color: var(--accent);
}

.field input::placeholder { color: #4a4a60; }

.field select option {
  background: var(--bg3);
  color: var(--text);
}

/* Date input calendar icon */
input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(0.5);
  cursor: pointer;
}

.btn-add {
  background: var(--accent);
  color: #1a1500;
  border: none;
  border-radius: 10px;
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  font-weight: 600;
  padding: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s ease;
  margin-top: 4px;
}

.btn-add span {
  font-size: 18px;
  line-height: 1;
}

.btn-add:hover {
  background: #f5d896;
  transform: translateY(-1px);
}

.btn-add:active { transform: translateY(0); }

/* ==============================
   Chart
============================== */
.chart-wrap {
  padding: 20px;
  display: flex;
  justify-content: center;
  max-height: 280px;
}

.chart-wrap canvas {
  max-height: 240px;
}

.chart-legend {
  padding: 0 20px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  color: var(--muted);
  background: var(--bg3);
  border-radius: 20px;
  padding: 4px 10px 4px 7px;
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.no-chart-msg {
  text-align: center;
  font-size: 13px;
  color: var(--muted);
  padding: 0 20px 24px;
  display: none;
}

/* ==============================
   Transactions Panel
============================== */
.transactions-panel {
  margin-bottom: 0;
}

.filter-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.filter-row select {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  padding: 7px 12px;
  outline: none;
  cursor: pointer;
}

.btn-clear {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--muted);
  font-family: 'DM Sans', sans-serif;
  font-size: 12px;
  padding: 7px 12px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-clear:hover {
  border-color: var(--expense);
  color: var(--expense);
}

/* ==============================
   Transaction List
============================== */
.tx-list {
  max-height: 600px;
  overflow-y: auto;
  padding: 8px 0;
}

.tx-list::-webkit-scrollbar { width: 4px; }
.tx-list::-webkit-scrollbar-track { background: transparent; }
.tx-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.tx-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s ease;
  animation: slideIn 0.25s ease;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(-10px); }
  to   { opacity: 1; transform: translateX(0); }
}

.tx-item:last-child { border-bottom: none; }
.tx-item:hover { background: var(--bg3); }

.tx-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  flex-shrink: 0;
}

.tx-info {
  flex: 1;
  min-width: 0;
}

.tx-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tx-meta {
  font-size: 11px;
  color: var(--muted);
  margin-top: 2px;
}

.tx-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  flex-shrink: 0;
}

.tx-amount {
  font-size: 15px;
  font-weight: 600;
}

.tx-amount.income { color: var(--income); }
.tx-amount.expense { color: var(--expense); }

.tx-delete {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 4px;
  transition: color 0.15s;
  line-height: 1;
}

.tx-delete:hover { color: var(--expense); }

/* ==============================
   Empty State
============================== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--muted);
}

.empty-icon {
  font-size: 36px;
  margin-bottom: 16px;
  opacity: 0.4;
}

.empty-state p {
  font-size: 14px;
  line-height: 1.7;
}

/* ==============================
   Toast
============================== */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--text);
  color: var(--bg);
  font-size: 13px;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: 30px;
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
  white-space: nowrap;
  z-index: 999;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ==============================
   Responsive
============================== */
@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .left-col { order: 1; }
  .right-col { order: 2; }
}

@media (max-width: 680px) {
  .cards-grid {
    grid-template-columns: 1fr;
  }

  .card-amount {
    font-size: 26px;
  }

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

  .panel-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .filter-row {
    flex-wrap: wrap;
  }

  .tx-item {
    padding: 12px 16px;
  }

  .header-inner {
    padding: 0 4px;
  }
}

/* Category icon background colors */
.cat-food       { background: rgba(244,165,106,0.15); }
.cat-transport  { background: rgba(126,201,232,0.15); }
.cat-shopping   { background: rgba(201,126,248,0.15); }
.cat-bills      { background: rgba(232,112, 92,0.15); }
.cat-entertainment { background: rgba(92,184,122,0.15); }
.cat-other      { background: rgba(170,170,170,0.12); }
.cat-income     { background: rgba(92,184,122,0.15); }