/* ══════════════════════════════════════════════
   LEDGER — Expense & Budget Visualizer
   Aesthetic: Editorial Dark Finance / Refined
══════════════════════════════════════════════ */

/* ── DESIGN TOKENS ───────────────────────────── */
:root {
  --c-bg:          #0f0f11;
  --c-surface:     #18181c;
  --c-surface-2:   #202026;
  --c-surface-3:   #2a2a32;
  --c-border:      #2e2e38;
  --c-text:        #e8e6e0;
  --c-text-2:      #9693a0;
  --c-text-3:      #5c5a6a;
  --c-accent:      #f0a500;
  --c-accent-dim:  #f0a50022;
  --c-danger:      #e05252;
  --c-danger-dim:  #e0525218;

  /* Category palette */
  --cat-food:      #f0a500;
  --cat-transport: #4db6c6;
  --cat-fun:       #a07df0;
  --cat-custom-0:  #e87b5a;
  --cat-custom-1:  #6db87a;
  --cat-custom-2:  #e06fa0;
  --cat-custom-3:  #60c0e0;
  --cat-custom-4:  #c0a060;

  --r-card:   14px;
  --r-input:  10px;
  --r-pill:    6px;

  --shadow-card: 0 2px 16px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 24px rgba(240,165,0,0.12);

  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body:    'DM Sans', sans-serif;
  --font-mono:    'DM Mono', monospace;

  --transition: 0.2s ease;
}

[data-theme="light"] {
  --c-bg:          #f4f2ec;
  --c-surface:     #ffffff;
  --c-surface-2:   #f0ede4;
  --c-surface-3:   #e8e4d8;
  --c-border:      #ddd9cc;
  --c-text:        #1a1814;
  --c-text-2:      #6b6660;
  --c-text-3:      #aaa89e;
  --c-accent:      #c88800;
  --c-accent-dim:  #c8880014;
  --c-danger:      #c94040;
  --c-danger-dim:  #c9404010;
  --shadow-card: 0 2px 16px rgba(0,0,0,0.08);
  --shadow-glow: 0 0 24px rgba(200,136,0,0.10);
}

/* ── RESET ───────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--c-bg);
  color: var(--c-text);
  min-height: 100dvh;
  max-width: 480px;
  margin: 0 auto;
  padding-bottom: 2rem;
  transition: background var(--transition), color var(--transition);
}

/* ── HEADER ──────────────────────────────────── */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-border);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-mark {
  font-size: 1.2rem;
  color: var(--c-accent);
  line-height: 1;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.3rem;
  letter-spacing: 0.01em;
  color: var(--c-text);
}

.header-right {
  display: flex;
  gap: 0.5rem;
}

.icon-btn {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  color: var(--c-text-2);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.85rem;
}

.icon-btn:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
  background: var(--c-accent-dim);
}

/* Theme icons */
[data-theme="dark"] .sun-icon  { display: block; }
[data-theme="dark"] .moon-icon { display: none; }
[data-theme="light"] .sun-icon  { display: none; }
[data-theme="light"] .moon-icon { display: block; }

/* ── BALANCE HERO ─────────────────────────────── */
.balance-hero {
  padding: 2rem 1.25rem 1.5rem;
  text-align: center;
  position: relative;
}

.balance-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-text-3);
  margin-bottom: 0.4rem;
}

.balance-amount {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 10vw, 3.2rem);
  font-weight: 400;
  color: var(--c-text);
  letter-spacing: -0.01em;
  line-height: 1.1;
  transition: color 0.3s ease;
}

.balance-amount.over-limit {
  color: var(--c-danger);
  animation: pulse-red 1.2s ease-in-out infinite;
}

@keyframes pulse-red {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.7; }
}

/* Balance stats row (budget / spent) */
.balance-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  margin-top: 0.9rem;
}

.balance-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
}

.balance-stat-label {
  font-size: 0.62rem;
  font-family: var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-text-3);
}

.balance-stat-value {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--c-text-2);
}

.balance-stat-value.positive { color: #6db87a; }
.balance-stat-value.negative { color: var(--c-danger); }

.balance-stat-divider {
  width: 1px;
  height: 28px;
  background: var(--c-border);
}

/* Balance bar (proportional category strips) */
.balance-bar {
  display: flex;
  height: 4px;
  border-radius: 4px;
  overflow: hidden;
  margin: 1.2rem auto 0;
  max-width: 240px;
  gap: 2px;
  background: var(--c-surface-3);
}

.balance-bar-segment {
  height: 100%;
  border-radius: 2px;
  transition: width 0.4s cubic-bezier(.4,0,.2,1);
}

/* Limit banner */
.limit-banner {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--c-danger-dim);
  border: 1px solid var(--c-danger);
  color: var(--c-danger);
  border-radius: var(--r-pill);
  padding: 0.45rem 0.75rem;
  font-size: 0.78rem;
  font-weight: 500;
  margin: 1rem auto 0;
  max-width: fit-content;
  animation: slide-in 0.3s ease;
}

/* ── SUMMARY PANEL ───────────────────────────── */
.panel {
  margin: 0 1.25rem 1rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-card);
  overflow: hidden;
  animation: slide-in 0.25s ease;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--c-border);
}

.panel-header h2 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 400;
}

.summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--c-border);
}

.summary-cell {
  background: var(--c-surface);
  padding: 1rem 1.25rem;
}

.summary-cell-label {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-text-3);
  margin-bottom: 0.3rem;
}

.summary-cell-value {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--c-text);
}

/* ── CHART SECTION ───────────────────────────── */
.chart-section {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.5rem 1.25rem 1.25rem;
}

.chart-wrap {
  position: relative;
  width: 130px;
  height: 130px;
  flex-shrink: 0;
}

.chart-wrap canvas {
  width: 100% !important;
  height: 100% !important;
}

.chart-center-label {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.chart-center-num {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--c-text);
  line-height: 1;
}

.chart-center-sub {
  font-size: 0.65rem;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  color: var(--c-text-3);
  text-transform: uppercase;
  margin-top: 2px;
}

/* Chart legend */
.chart-legend {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

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

.legend-name {
  font-size: 0.78rem;
  color: var(--c-text-2);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.legend-pct {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--c-text-3);
}

/* ── FORM SECTION ─────────────────────────────── */
.form-section {
  padding: 0 1.25rem 1.25rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 400;
  color: var(--c-text-2);
  letter-spacing: 0.01em;
  margin-bottom: 0.75rem;
}

.form-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-card);
  padding: 1.1rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.form-row {
  display: flex;
  gap: 0.65rem;
}

.form-row--actions {
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex: 1;
}

.field--sm { flex: 0.85; }

label {
  font-size: 0.68rem;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-text-3);
}

input[type="text"],
input[type="number"],
select {
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--r-input);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 0.88rem;
  padding: 0.55rem 0.75rem;
  width: 100%;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  -webkit-appearance: none;
  appearance: none;
}

input[type="text"]::placeholder,
input[type="number"]::placeholder {
  color: var(--c-text-3);
}

input:focus, select:focus {
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px var(--c-accent-dim);
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239693a0' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.65rem center;
  padding-right: 2rem;
  cursor: pointer;
}

.error-msg {
  font-size: 0.76rem;
  color: var(--c-danger);
  font-family: var(--font-mono);
  min-height: 1rem;
  animation: slide-in 0.2s ease;
}

/* ── BUTTONS ─────────────────────────────────── */
.btn {
  border: none;
  border-radius: var(--r-input);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.55rem 1.1rem;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--c-accent);
  color: #0f0f11;
}

.btn--primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(240,165,0,0.3);
}

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

.btn--secondary {
  background: var(--c-surface-2);
  color: var(--c-text-2);
  border: 1px solid var(--c-border);
}

.btn--secondary:hover {
  border-color: var(--c-text-3);
  color: var(--c-text);
}

/* ── LIST SECTION ─────────────────────────────── */
.list-section {
  padding: 0 1.25rem;
}

.list-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.sort-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sort-controls label {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-3);
}

.sort-controls select {
  padding: 0.3rem 1.8rem 0.3rem 0.6rem;
  font-size: 0.78rem;
  background: var(--c-surface);
  border-color: var(--c-border);
  width: auto;
}

.transaction-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 420px;
  overflow-y: auto;
  padding-right: 2px;
}

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

/* Transaction item */
.tx-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-card);
  padding: 0.85rem 1rem;
  animation: slide-in 0.25s ease;
  transition: border-color var(--transition), background var(--transition);
}

.tx-item:hover {
  border-color: var(--c-surface-3);
  background: var(--c-surface-2);
}

.tx-item.over-limit {
  border-color: var(--c-danger);
  background: var(--c-danger-dim);
}

.tx-cat-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

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

.tx-name {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--c-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tx-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.2rem;
}

.tx-category {
  font-size: 0.67rem;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-text-3);
}

.tx-date {
  font-size: 0.65rem;
  color: var(--c-text-3);
  font-family: var(--font-mono);
}

.tx-amount {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--c-text);
  white-space: nowrap;
}

.tx-delete {
  background: none;
  border: none;
  color: var(--c-text-3);
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition), background var(--transition);
  flex-shrink: 0;
}

.tx-delete:hover {
  color: var(--c-danger);
  background: var(--c-danger-dim);
}

/* Empty state */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 1rem;
  gap: 0.75rem;
  color: var(--c-text-3);
  text-align: center;
}

.empty-icon {
  font-size: 2rem;
  color: var(--c-border);
}

.empty-state p {
  font-size: 0.82rem;
  line-height: 1.6;
}

/* ── MODAL ────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  animation: fade-in 0.2s ease;
}

.modal {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-card);
  padding: 1.5rem;
  width: 100%;
  max-width: 320px;
  box-shadow: var(--shadow-card);
  animation: slide-up 0.25s ease;
}

.modal h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 400;
  margin-bottom: 1rem;
}

.modal input {
  margin-bottom: 1rem;
}

.modal-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}

/* ── ANIMATIONS ──────────────────────────────── */
@keyframes slide-in {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes slide-up {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ── RESPONSIVE TWEAKS ───────────────────────── */
@media (max-width: 380px) {
  .form-row { flex-direction: column; }
  .field--sm { flex: 1; }
  .chart-section { flex-direction: column; align-items: center; }
  .chart-legend { width: 100%; flex-direction: row; flex-wrap: wrap; gap: 0.5rem; }
}