/* ==========================================
   Personal Finance Dashboard — Styles
   Clean light mode, professional aesthetic
   ========================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

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

:root {
  --primary: #2563EB;
  --primary-light: #DBEAFE;
  --primary-dark: #1D4ED8;
  --green: #16A34A;
  --green-light: #DCFCE7;
  --red: #DC2626;
  --red-light: #FEE2E2;
  --orange: #EA580C;
  --orange-light: #FFF7ED;
  --purple: #7C3AED;
  --purple-light: #EDE9FE;
  --bg: #F8FAFC;
  --bg-card: #FFFFFF;
  --text: #0F172A;
  --text-secondary: #64748B;
  --text-muted: #94A3B8;
  --border: #E2E8F0;
  --border-focus: #2563EB;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.1);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ---- Layout ---- */
.app {
  max-width: 1360px;
  margin: 0 auto;
  padding: 24px 20px 80px;
}

/* ---- Header ---- */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 28px;
}

.header__left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.header__icon {
  font-size: 2.4rem;
}

.header__title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}

.header__subtitle {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.header__actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn--primary {
  background: var(--primary);
  color: #fff;
}
.btn--primary:hover { background: var(--primary-dark); }

.btn--outline {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn--outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow);
}

.btn--sm {
  padding: 8px 14px;
  font-size: 1rem;
  border-radius: var(--radius-xs);
}

.btn--danger {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  padding: 4px;
  cursor: pointer;
}
.btn--danger:hover { color: var(--red); }

/* ---- Select ---- */
.month-select {
  padding: 10px 14px;
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  outline: none;
}
.month-select:focus { border-color: var(--primary); }

/* ---- Cards ---- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.card:hover { box-shadow: var(--shadow-md); }

/* ---- Summary Cards ---- */
.summary-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}

.summary-card {
  position: relative;
  overflow: hidden;
}
.summary-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
}
.summary-card--income::before { background: var(--primary); }
.summary-card--expense::before { background: var(--red); }
.summary-card--savings::before { background: var(--green); }
.summary-card--networth::before { background: var(--purple); }

.summary-card__label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.summary-card__value {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}

.summary-card__trend {
  font-size: 0.8rem;
  font-weight: 500;
  margin-top: 4px;
}

.summary-card__sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.trend-up { color: var(--green); }
.trend-down { color: var(--red); }

/* ---- Main Grid ---- */
.main-grid {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 24px;
  align-items: start;
}

.input-column, .chart-column {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ---- Panel Titles ---- */
.panel-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}

.sub-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

/* ---- Inputs ---- */
.input {
  padding: 10px 14px;
  font-family: var(--font);
  font-size: 0.88rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  background: var(--bg);
  color: var(--text);
  outline: none;
  transition: var(--transition);
  width: 100%;
}
.input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.1); }
.input--amount { max-width: 120px; }

.input-row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 10px;
}

/* ---- Input List Items ---- */
.input-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 4px;
}

.list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--bg);
  border-radius: var(--radius-xs);
  font-size: 0.88rem;
}

.list-item__name { color: var(--text); font-weight: 500; }
.list-item__amount { font-weight: 700; color: var(--primary); }
.list-item__actions { display: flex; gap: 4px; }

/* ---- Category Grid ---- */
.category-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

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

.category-input label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.category-input input {
  padding: 8px 10px;
  font-family: var(--font);
  font-size: 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  background: var(--bg);
  color: var(--text);
  outline: none;
}
.category-input input:focus { border-color: var(--primary); }

/* ---- Net Worth Grid ---- */
.networth-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ---- Chart Container ---- */
.chart-container {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}

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

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  flex-shrink: 0;
}

.legend-value {
  font-weight: 700;
  color: var(--text);
  margin-left: auto;
  padding-left: 12px;
}

/* ---- Budget Bars ---- */
.budget-bars {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.budget-bar__header {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
}

.budget-bar__name { font-weight: 600; color: var(--text); }
.budget-bar__values { color: var(--text-secondary); }
.budget-bar__values .over { color: var(--red); font-weight: 700; }

.budget-bar__track {
  height: 10px;
  background: var(--bg);
  border-radius: 5px;
  overflow: hidden;
  position: relative;
}

.budget-bar__fill {
  height: 100%;
  border-radius: 5px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.budget-bar__fill--ok { background: var(--primary); }
.budget-bar__fill--warn { background: var(--orange); }
.budget-bar__fill--over { background: var(--red); }

/* ---- 50/30/20 Rule ---- */
.rule-bars {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.rule-bar__header {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}

.rule-bar__label { font-weight: 600; }
.rule-bar__value { color: var(--text-secondary); }

.rule-bar__track {
  height: 14px;
  background: var(--bg);
  border-radius: 7px;
  overflow: hidden;
  position: relative;
}

.rule-bar__goal {
  position: absolute;
  top: 0;
  height: 100%;
  width: 2px;
  background: var(--text);
  z-index: 2;
}

.rule-bar__fill {
  height: 100%;
  border-radius: 7px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- Alerts ---- */
.alert-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--red-light);
  border: 1px solid rgba(220,38,38,0.2);
  border-radius: var(--radius-xs);
  font-size: 0.85rem;
  color: var(--red);
  font-weight: 500;
  margin-bottom: 8px;
}

.alert-item:last-child { margin-bottom: 0; }

/* ---- Trend Chart Canvas ---- */
#trendChart {
  width: 100%;
  height: auto;
}

/* ---- Budget List ---- */
.budget-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

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

.budget-item label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.budget-item input {
  padding: 8px 10px;
  font-family: var(--font);
  font-size: 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  background: var(--bg);
  color: var(--text);
  outline: none;
}

.budget-item input:focus { border-color: var(--primary); }

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .main-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .summary-cards {
    grid-template-columns: 1fr 1fr;
  }
  .header {
    flex-direction: column;
    align-items: flex-start;
  }
  .summary-card__value { font-size: 1.4rem; }
  .category-grid { grid-template-columns: 1fr; }
  .networth-grid { grid-template-columns: 1fr; }
  .budget-list { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .summary-cards {
    grid-template-columns: 1fr;
  }
  .app { padding: 16px 12px 48px; }
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

::selection { background: var(--primary); color: #fff; }