:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --subcard: #f9fafb;
  --field: #ffffff;
  --th-bg: #f9fafb;
  --border: #e2e5ea;
  --text: #1a1f2b;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #dc2626;
  --success: #16a34a;
  --warn: #d97706;
  --tag-bg: #f3f4f6;
  --tag-fg: #6b7280;
  --tag-active-bg: #dcfce7;
  --tag-active-fg: #15803d;
  --tag-inactive-bg: #fee2e2;
  --tag-inactive-fg: #991b1b;
  --tag-inv-bg: #dbeafe;
  --tag-inv-fg: #1e40af;
  --tag-exp-bg: #fef3c7;
  --tag-exp-fg: #92400e;
  --err-bg: #fee2e2;
  --err-fg: #991b1b;
  --ok-bg: #dcfce7;
  --ok-fg: #166534;
  --topbar-bg: #ffffff;
  --tabs-bg: #ffffff;
  --btn-secondary-bg: #ffffff;
  --btn-secondary-hover: #f3f4f6;
  --overlay: rgba(0, 0, 0, 0.5);
  --shadow-sm: 0 1px 2px rgba(15, 20, 25, 0.03), 0 1px 3px rgba(15, 20, 25, 0.05);
  --shadow-md: 0 4px 12px rgba(15, 20, 25, 0.06), 0 2px 6px rgba(15, 20, 25, 0.04);
  --shadow-lg: 0 12px 32px rgba(15, 20, 25, 0.12);
  --focus-ring: rgba(37, 99, 235, 0.15);
  --seg-track: #eef0f3;
  --seg-active: #ffffff;
  --row-inv-stripe: #93c5fd;
  --row-exp-stripe: #fcd34d;
  --inv-glow: rgba(59, 130, 246, 0.32);
  --exp-glow: rgba(217, 119, 6, 0.28);
  --inv-ring: rgba(59, 130, 246, 0.55);
  --exp-ring: rgba(217, 119, 6, 0.55);
  --inv-bar: #3b82f6;
  --exp-bar: #d97706;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #0f1419;
  --card: #1a1f2b;
  --subcard: #232a39;
  --field: #232a39;
  --th-bg: #232a39;
  --border: #2a3346;
  --text: #e4e7eb;
  --muted: #8b96a8;
  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --danger: #ef4444;
  --success: #22c55e;
  --warn: #f59e0b;
  --tag-bg: #232a39;
  --tag-fg: #8b96a8;
  --tag-active-bg: #14532d;
  --tag-active-fg: #86efac;
  --tag-inactive-bg: #7f1d1d;
  --tag-inactive-fg: #fca5a5;
  --tag-inv-bg: #1e3a8a;
  --tag-inv-fg: #93c5fd;
  --tag-exp-bg: #78350f;
  --tag-exp-fg: #fcd34d;
  --err-bg: #4a1414;
  --err-fg: #fca5a5;
  --ok-bg: #0f3a1f;
  --ok-fg: #86efac;
  --topbar-bg: #1a1f2b;
  --tabs-bg: #1a1f2b;
  --btn-secondary-bg: #232a39;
  --btn-secondary-hover: #2d3548;
  --overlay: rgba(0, 0, 0, 0.7);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2), 0 1px 3px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3), 0 2px 6px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);
  --focus-ring: rgba(59, 130, 246, 0.22);
  --seg-track: #0f1419;
  --seg-active: #2d3548;
  --row-inv-stripe: #60a5fa;
  --row-exp-stripe: #d97706;
  --inv-glow: rgba(96, 165, 250, 0.4);
  --exp-glow: rgba(245, 158, 11, 0.36);
  --inv-ring: rgba(96, 165, 250, 0.65);
  --exp-ring: rgba(245, 158, 11, 0.6);
  --inv-bar: #60a5fa;
  --exp-bar: #f59e0b;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.4;
  transition: background-color 0.2s ease, color 0.2s ease;
}

a { color: var(--primary); text-decoration: none; }
button { font-family: inherit; font-size: inherit; cursor: pointer; }

.topbar {
  background: var(--topbar-bg);
  border-bottom: 1px solid var(--border);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar h1 { margin: 0; font-size: 18px; }
.topbar .spacer { flex: 1; }
.topbar .user { color: var(--muted); font-size: 14px; }

.tabs {
  display: flex;
  gap: 4px;
  padding: 0 16px;
  background: var(--tabs-bg);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.tabs button {
  background: none;
  border: none;
  padding: 12px 14px;
  color: var(--muted);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.15s ease, border-color 0.15s ease;
}
@media (hover: hover) {
  .tabs button:hover { color: var(--text); }
}
.tabs button.active { color: var(--primary); border-color: var(--primary); }

.container { padding: 16px; max-width: 1100px; margin: 0 auto; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}
.card h2 { margin: 0 0 12px 0; font-size: 16px; }
.card.subcard { background: var(--subcard); box-shadow: none; }
.card.kind-investment {
  border-color: var(--inv-ring);
  box-shadow:
    inset 0 4px 0 var(--inv-bar),
    0 0 0 1px var(--inv-ring),
    0 10px 28px var(--inv-glow),
    var(--shadow-sm);
  padding-top: 20px;
}
.card.kind-expense {
  border-color: var(--exp-ring);
  box-shadow:
    inset 0 4px 0 var(--exp-bar),
    0 0 0 1px var(--exp-ring),
    0 10px 28px var(--exp-glow),
    var(--shadow-sm);
  padding-top: 20px;
}

.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1 1 160px; min-width: 0; }

.date-pair {
  display: flex;
  gap: 8px;
  flex: 1 1 260px;
}
.date-pair > div { flex: 1 1 0; min-width: 0; }

.segmented {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3px;
  background: var(--seg-track);
  gap: 2px;
  width: 100%;
}
.segmented button {
  flex: 1 1 0;
  padding: 8px 10px;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
  min-height: 38px;
  font-family: inherit;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.segmented button.active {
  background: var(--primary);
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 2px 6px var(--focus-ring);
}
@media (hover: hover) {
  .segmented button:not(.active):hover { color: var(--text); }
}
.segmented.kind-tinted button.active[data-val="investment"],
.segmented.tint-investment button.active {
  background: var(--inv-bar);
  color: #ffffff;
  box-shadow: 0 2px 6px var(--inv-glow);
}
.segmented.kind-tinted button.active[data-val="expense"],
.segmented.tint-expense button.active {
  background: var(--exp-bar);
  color: #ffffff;
  box-shadow: 0 2px 6px var(--exp-glow);
}

label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
input, select, textarea {
  width: 100%;
  min-width: 0;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--field);
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
input[type="date"] {
  -webkit-min-logical-width: 0;
  max-width: 100%;
}
textarea { resize: vertical; min-height: 60px; }
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.btn {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 10px 16px;
  border-radius: 6px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background-color 0.15s ease, transform 0.08s ease, box-shadow 0.15s ease;
}
.btn:hover { background: var(--primary-hover); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn.secondary { background: var(--btn-secondary-bg); color: var(--text); border: 1px solid var(--border); }
.btn.secondary:hover { background: var(--btn-secondary-hover); }
.btn.secondary.active { border-color: var(--primary); color: var(--primary); }
.btn.danger { background: var(--danger); color: #fff; }
.btn.danger:hover { filter: brightness(1.05); }
.btn.kind-investment { background: var(--inv-bar); color: #fff; }
.btn.kind-investment:hover { background: var(--inv-bar); filter: brightness(0.93); }
.btn.kind-expense { background: var(--exp-bar); color: #fff; }
.btn.kind-expense:hover { background: var(--exp-bar); filter: brightness(0.93); }
.btn.small { padding: 6px 10px; font-size: 13px; gap: 4px; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 8px 10px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: var(--th-bg); font-weight: 600; color: var(--muted); font-size: 13px; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tr:last-child td { border-bottom: none; }
tbody tr { transition: background-color 0.15s ease; }
@media (hover: hover) {
  tbody tr:hover { background: var(--th-bg); }
}
tbody tr.row-investment > td:first-child { box-shadow: inset 2px 0 0 var(--row-inv-stripe); }
tbody tr.row-expense > td:first-child { box-shadow: inset 2px 0 0 var(--row-exp-stripe); }

.balance-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.balance-tile {
  background: var(--subcard);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
@media (hover: hover) {
  .balance-tile:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
}
.balance-tile .label {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 6px;
}
.balance-tile .value {
  font-size: 28px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  margin-top: 6px;
  line-height: 1.1;
}
.pos { color: var(--success); }
.neg { color: var(--danger); }

.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 12px;
  background: var(--tag-bg);
  color: var(--tag-fg);
}
.tag.active { background: var(--tag-active-bg); color: var(--tag-active-fg); }
.tag.inactive { background: var(--tag-inactive-bg); color: var(--tag-inactive-fg); }
.tag.inv { background: var(--tag-inv-bg); color: var(--tag-inv-fg); }
.tag.exp { background: var(--tag-exp-bg); color: var(--tag-exp-fg); }

.err { background: var(--err-bg); color: var(--err-fg); padding: 10px; border-radius: 6px; margin-bottom: 12px; }
.ok { background: var(--ok-bg); color: var(--ok-fg); padding: 10px; border-radius: 6px; margin-bottom: 12px; }

.login-wrap {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  gap: 14px;
}
.login-wrap .card { width: 100%; max-width: 360px; margin: 0; }

.flex-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.muted { color: var(--muted); font-size: 13px; }

.mobile-scroll { overflow-x: auto; }

.settings-bar { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }

.pager {
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px; flex-wrap: wrap; margin-top: 12px; padding-top: 12px;
  border-top: 1px solid var(--border);
}
.pager-ctrls { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.pager-size { width: auto; padding: 6px 8px; }
button[disabled] { opacity: 0.5; cursor: not-allowed; }

.warn-text { color: var(--danger); font-weight: bold; }

.modal-bg {
  position: fixed; inset: 0;
  background: var(--overlay);
  display: flex; align-items: center; justify-content: center;
  z-index: 100; padding: 16px;
  animation: fade-in 0.15s ease-out;
}
.modal-bg > .card {
  box-shadow: var(--shadow-lg);
  animation: card-in 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes card-in {
  from { transform: translateY(-8px) scale(0.98); opacity: 0; }
  to { transform: translateY(0) scale(1); opacity: 1; }
}

.skeleton {
  height: 14px;
  margin: 10px 0;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--border) 25%, var(--subcard) 50%, var(--border) 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite;
}
.skeleton.short { width: 60%; }
.skeleton.medium { width: 80%; }
@keyframes skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.toast-host {
  position: fixed;
  bottom: 16px;
  right: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 200;
  pointer-events: none;
  max-width: calc(100% - 32px);
}
.toast {
  background: var(--card);
  border: 1px solid var(--border);
  border-left-width: 3px;
  border-radius: 8px;
  padding: 10px 14px;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 10px;
  pointer-events: auto;
  animation: toast-in 0.25s ease-out;
  color: var(--text);
}
.toast.ok { border-left-color: var(--success); }
.toast.ok > svg { color: var(--success); }
.toast.err { border-left-color: var(--danger); }
.toast.err > svg { color: var(--danger); }
.toast.leaving { animation: toast-out 0.2s ease-in forwards; }
@keyframes toast-in {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
@keyframes toast-out {
  to { transform: translateY(10px); opacity: 0; }
}
@media (max-width: 600px) {
  .toast-host { left: 16px; right: 16px; bottom: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

.btn.icon-only { padding: 6px 8px; }

@media (max-width: 600px) {
  .topbar { position: static; }
  .topbar h1 { font-size: 16px; }
  th, td { padding: 6px 8px; }
  .balance-tile { padding: 12px; }
  .balance-tile .value { font-size: 22px; }
  .card { padding: 14px; }
  .tabs button { padding: 10px 12px; gap: 4px; }
}