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

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

/* ─── Variables ──────────────────────────────────────── */
:root {
  --bg:         #07090f;
  --surface:    #0d1117;
  --surface2:   #111820;
  --border:     #161f2e;
  --border2:    #1d2d40;
  --text:       #e2e8f0;
  --text2:      #94a3b8;
  --text3:      #475569;
  --text4:      #2a3a50;
  --accent:     #3b82f6;
  --accent-dim: #1e3a5f;
  --green:      #34d399;
  --green-dim:  #0a2318;
  --red:        #f87171;
  --red-dim:    #2d1212;
  --yellow:     #fbbf24;
  --mono:       'IBM Plex Mono', monospace;
  --sans:       'Inter', sans-serif;
  --radius:     10px;
  --radius-lg:  14px;
}

/* ─── Base ───────────────────────────────────────────── */
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  -webkit-font-smoothing: antialiased;
}

/* ─── Sidebar ────────────────────────────────────────── */
.sidebar {
  width: 220px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 24px 0;
  flex-shrink: 0;
  position: fixed;
  height: 100vh;
  top: 0; left: 0;
  z-index: 10;
}

.logo {
  padding: 0 20px 32px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, #1d6fa4, #3b82f6);
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 700; color: #fff;
  flex-shrink: 0;
}

.logo-text { font-size: 14px; font-weight: 600; color: var(--text); }
.logo-sub  { font-size: 10px; color: var(--text4); letter-spacing: 0.1em; text-transform: uppercase; }

nav { flex: 1; padding: 0 10px; display: flex; flex-direction: column; gap: 2px; }

.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius);
  border: none; background: transparent;
  color: var(--text3); font-size: 13px; font-family: var(--sans);
  cursor: pointer; text-align: left; text-decoration: none;
  border-left: 2px solid transparent;
  transition: all 0.15s;
}

.nav-item:hover  { color: var(--text2); background: var(--surface2); }
.nav-item.active { color: var(--accent); background: #0f1e35; border-left-color: var(--accent); font-weight: 500; }
.nav-icon { font-size: 15px; width: 18px; text-align: center; }

/* ─── Main layout ────────────────────────────────────── */
.main {
  margin-left: 220px;
  flex: 1;
  padding: 32px 36px;
  min-height: 100vh;
}

/* ─── Page header ────────────────────────────────────── */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 28px;
}

.page-label {
  font-size: 11px; color: var(--text4);
  letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 6px;
}

.page-title {
  font-size: 26px; font-weight: 600;
  letter-spacing: -0.02em; color: var(--text);
}

/* ─── Cards ──────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute; top: 0; right: 0;
  width: 60px; height: 60px;
  border-radius: 0 var(--radius-lg) 0 60px;
}

.card.asset::before     { background: radial-gradient(circle, rgba(52,211,153,0.08) 0%, transparent 70%); }
.card.liability::before { background: radial-gradient(circle, rgba(248,113,113,0.08) 0%, transparent 70%); }
.card.net::before       { background: radial-gradient(circle, rgba(59,130,246,0.08) 0%, transparent 70%); }

.card-label { font-size: 10px; color: var(--text3); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 10px; }
.card-value { font-family: var(--mono); font-size: 22px; font-weight: 500; letter-spacing: -0.02em; }
.card.asset .card-value     { color: var(--green); }
.card.liability .card-value { color: var(--red); }
.card.net .card-value       { color: var(--accent); }
.card-sub { font-size: 11px; color: var(--text3); margin-top: 6px; }

/* ─── Buttons ────────────────────────────────────────── */
.btn {
  padding: 6px 14px; border-radius: 7px; border: none;
  font-family: var(--sans); font-size: 12px; font-weight: 500;
  cursor: pointer; transition: all 0.15s; white-space: nowrap;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #2563eb; }

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border2);
  color: var(--text3);
}
.btn-ghost:hover { color: var(--text2); border-color: var(--text3); }

.btn-danger { background: transparent; border: 1px solid var(--red-dim); color: var(--red); }
.btn-danger:hover { background: var(--red-dim); }

.btn-sm { padding: 4px 10px; font-size: 11px; }
.btn-xs { padding: 2px 8px; font-size: 11px; }

/* ─── Inputs ─────────────────────────────────────────── */
.input {
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 7px;
  padding: 7px 12px;
  color: var(--text);
  font-family: var(--sans);
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
}

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

.input-mono {
  font-family: var(--mono);
  text-align: right;
}

select.input {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23475569'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}

/* ─── Toast ──────────────────────────────────────────── */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 12px 18px;
  font-size: 13px; color: var(--text2);
  opacity: 0; transform: translateY(8px);
  transition: all 0.3s;
  pointer-events: none;
  z-index: 200;
}

.toast.show    { opacity: 1; transform: translateY(0); }
.toast.success { border-color: var(--green); color: var(--green); }
.toast.error   { border-color: var(--red); color: var(--red); }

/* ─── Modal ──────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  opacity: 0; pointer-events: none;
  transition: opacity 0.2s;
}

.modal-overlay.show { opacity: 1; pointer-events: all; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--radius-lg);
  padding: 28px;
  width: 100%;
  max-width: 420px;
  transform: translateY(8px);
  transition: transform 0.2s;
}

.modal-overlay.show .modal { transform: translateY(0); }

.modal-title { font-size: 16px; font-weight: 600; margin-bottom: 20px; color: var(--text); }
.modal-body  { display: flex; flex-direction: column; gap: 14px; margin-bottom: 24px; }
.modal-label { font-size: 11px; color: var(--text3); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 6px; }
.modal-footer { display: flex; gap: 8px; justify-content: flex-end; }

/* ─── Confirm dialog ─────────────────────────────────── */
.confirm-text { font-size: 13px; color: var(--text2); line-height: 1.6; margin-bottom: 20px; }
.confirm-name { color: var(--text); font-weight: 500; }

/* ─── Loading ────────────────────────────────────────── */
.loading {
  display: flex; align-items: center; justify-content: center;
  padding: 60px; color: var(--text3); font-size: 13px; gap: 10px;
}

.spinner {
  width: 16px; height: 16px;
  border: 2px solid var(--border2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Rate block ─────────────────────────────────────── */
.rate-block {
  display: flex; align-items: center; gap: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 16px;
}

.rate-label { font-size: 11px; color: var(--text3); letter-spacing: 0.08em; text-transform: uppercase; }
.rate-value { font-family: var(--mono); font-size: 15px; color: var(--yellow); font-weight: 500; }
.rate-input { width: 90px; }

/* ─── Balance sections ───────────────────────────────── */
.summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 28px;
}

.section { margin-bottom: 16px; }

.section-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius) var(--radius) 0 0;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s;
}

.section-header:hover { background: #141e2d; }

.section-header-left { display: flex; align-items: center; gap: 10px; }

.section-title {
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
}

.section-title.asset     { color: var(--green); }
.section-title.liability { color: var(--red); }

.section-subtotal { font-family: var(--mono); font-size: 13px; font-weight: 500; }

.section-body {
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  overflow: hidden;
}

.chevron { transition: transform 0.2s; font-size: 11px; color: var(--text3); }
.collapsed .chevron { transform: rotate(-90deg); }
.collapsed .section-body { display: none; }

/* ─── Balance item row ───────────────────────────────── */
.item-row {
  display: grid;
  grid-template-columns: 1fr 180px 120px 130px;
  align-items: center;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  transition: background 0.12s;
  gap: 12px;
}

.item-row:last-child { border-bottom: none; }
.item-row:hover { background: var(--surface2); }

.item-name { font-size: 13px; color: var(--text2); }
.item-note { font-size: 11px; color: var(--text4); margin-top: 2px; }

.item-amount { font-family: var(--mono); font-size: 13px; color: var(--text); text-align: right; }
.item-amount.usd { color: var(--yellow); }
.item-amount-rub { font-size: 11px; color: var(--text4); text-align: right; margin-top: 2px; }

.item-updated { font-size: 11px; color: var(--text4); text-align: right; }

.item-actions { display: flex; gap: 6px; justify-content: flex-end; align-items: center; }

/* ─── Add item row ───────────────────────────────────── */
.add-item-row {
  padding: 8px 16px;
  border-top: 1px dashed var(--border2);
  display: flex; justify-content: flex-start;
}

/* ─── Burger button (mobile only) ───────────────────── */
.burger {
  display: none;
  position: fixed;
  top: 14px; left: 14px;
  z-index: 50;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: 8px;
  width: 38px; height: 38px;
  align-items: center; justify-content: center;
  cursor: pointer;
  flex-direction: column; gap: 5px;
  padding: 0;
}

.burger span {
  display: block;
  width: 18px; height: 2px;
  background: var(--text2);
  border-radius: 2px;
  transition: all 0.2s;
}

.sidebar-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 15;
  backdrop-filter: blur(2px);
}

/* ─── Responsive: tablet ─────────────────────────────── */
@media (max-width: 900px) {
  .burger { display: flex; }

  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.25s cubic-bezier(.4,0,.2,1);
    z-index: 20;
  }

  .sidebar.open { transform: translateX(0); }

  .sidebar-overlay.show { display: block; }

  .main { margin-left: 0; padding: 24px 20px; padding-top: 64px; }

  .page-header {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
  }

  .rate-block { width: 100%; flex-wrap: wrap; }

  .summary { grid-template-columns: 1fr; gap: 10px; }

  .item-row {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 8px;
  }

  .item-row > div:nth-child(1) { grid-column: 1 / 2; }
  .item-row > div:nth-child(2) { grid-column: 2 / 3; }
  .item-updated { display: none; }
  .item-actions { grid-column: 1 / -1; justify-content: flex-start; }
}

/* ─── Responsive: mobile ─────────────────────────────── */
@media (max-width: 480px) {
  .main { padding: 16px; padding-top: 60px; }

  .page-title { font-size: 22px; }

  .card-value { font-size: 18px; }

  .item-row {
    grid-template-columns: 1fr;
    padding: 12px 14px;
  }

  .item-row > div:nth-child(2) { text-align: left; }

  .item-amount { text-align: left; }

  .item-actions { justify-content: flex-start; flex-wrap: wrap; }

  .modal { padding: 20px; margin: 16px; }

  .section-header { padding: 10px 12px; }

  .add-item-row { padding: 8px 12px; }
}