:root {
  --color-bg: #f3f4f8;
  --color-surface: #ffffff;
  --color-surface-2: #ffffff;
  --color-border: #e2e4ea;
  --color-text: #1a1d29;
  --color-muted: #6b7280;
  --color-primary: #3b6fed;
  --color-primary-hover: #2d59c4;
  --color-success: #1f9d55;
  --color-success-hover: #17803f;
  --color-danger: #d64545;
  --color-danger-bg: #fdecec;
  --color-pill-bg: #eceef3;
  --radius: 12px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0d1420;
    --color-surface: #182236;
    --color-surface-2: #131b2b;
    --color-border: #2a3650;
    --color-text: #eef1f7;
    --color-muted: #8b95ab;
    --color-primary: #3b6fed;
    --color-primary-hover: #5686ff;
    --color-success: #22a55e;
    --color-success-hover: #34c172;
    --color-danger: #ef5350;
    --color-danger-bg: #3a1f22;
    --color-pill-bg: #2a3650;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --color-bg: #0d1420;
  --color-surface: #182236;
  --color-surface-2: #131b2b;
  --color-border: #2a3650;
  --color-text: #eef1f7;
  --color-muted: #8b95ab;
  --color-primary: #3b6fed;
  --color-primary-hover: #5686ff;
  --color-success: #22a55e;
  --color-success-hover: #34c172;
  --color-danger: #ef5350;
  --color-danger-bg: #3a1f22;
  --color-pill-bg: #2a3650;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --color-bg: #f3f4f8;
  --color-surface: #ffffff;
  --color-surface-2: #ffffff;
  --color-border: #e2e4ea;
  --color-text: #1a1d29;
  --color-muted: #6b7280;
  --color-primary: #3b6fed;
  --color-primary-hover: #2d59c4;
  --color-success: #1f9d55;
  --color-success-hover: #17803f;
  --color-danger: #d64545;
  --color-danger-bg: #fdecec;
  --color-pill-bg: #eceef3;
  color-scheme: light;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 16px;
  line-height: 1.4;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px 16px 32px;
}

.container.has-bottom-nav {
  padding-bottom: calc(84px + env(safe-area-inset-bottom));
}

/* Flat header, matches page background with a hairline separator */
header.topbar {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

header.topbar .topbar-inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
}

header.topbar h1 {
  font-size: 1.15rem;
  margin: 0;
  color: var(--color-text);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

header.topbar form { margin: 0; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-pill-bg);
  border: none;
  border-radius: 999px;
  color: var(--color-text);
  cursor: pointer;
  padding: 0;
}

.icon-btn svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
  .icon-sun { display: none; }
  .icon-moon { display: block; }
}
:root[data-theme="dark"] .icon-sun { display: none; }
:root[data-theme="dark"] .icon-moon { display: block; }
:root[data-theme="light"] .icon-sun { display: block; }
:root[data-theme="light"] .icon-moon { display: none; }

.pill-btn {
  display: inline-flex;
  align-items: center;
  background: var(--color-pill-bg);
  color: var(--color-text);
  border: none;
  border-radius: 999px;
  padding: 10px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
}

/* Fixed bottom tab bar */
nav.bottom-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 20;
  background: var(--color-surface-2);
  border-top: 1px solid var(--color-border);
  padding-bottom: env(safe-area-inset-bottom);
}

nav.bottom-nav .bottom-nav-inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
}

nav.bottom-nav a {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 4px 8px;
  text-decoration: none;
  color: var(--color-muted);
  font-size: 0.72rem;
  font-weight: 600;
}

nav.bottom-nav a svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

nav.bottom-nav a.active {
  color: var(--color-primary);
}

h2 { font-size: 1.25rem; margin: 0 0 12px; }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}

.item-list { list-style: none; margin: 0; padding: 0; }

.item-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  gap: 8px;
}

.item-row:last-child { border-bottom: none; }

.item-name { font-weight: 600; }
.item-category { color: var(--color-muted); font-size: 0.85rem; }

.stock-badge {
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--color-pill-bg);
  color: var(--color-success);
  white-space: nowrap;
}

.stock-badge.zero {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

.empty-state {
  color: var(--color-muted);
  text-align: center;
  padding: 24px 8px;
}

form .field { margin-bottom: 16px; }

label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.9rem;
}

input[type="text"],
input[type="number"],
input[type="password"],
input[type="date"],
select,
textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  background: var(--color-surface);
  color: var(--color-text);
}

.hint { color: var(--color-muted); font-size: 0.82rem; margin-top: 4px; }

.radio-group { display: flex; gap: 16px; margin-bottom: 12px; }
.radio-group label { display: flex; align-items: center; gap: 6px; font-weight: 500; }
.radio-group input { width: auto; }

button, .btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 12px 20px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  width: 100%;
}

button:hover, .btn:hover { background: var(--color-primary-hover); }

button.btn-success { background: var(--color-success); }
button.btn-success:hover { background: var(--color-success-hover); }

.alert {
  padding: 12px 14px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 0.92rem;
}

.alert-error {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border: 1px solid var(--color-danger);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.filter-bar a, .filter-bar button {
  width: auto;
  padding: 8px 14px;
  font-size: 0.88rem;
  font-weight: 500;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.filter-bar a.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.custom-range {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: flex-end;
  margin-bottom: 16px;
}
.custom-range .field { margin-bottom: 0; flex: 1 1 140px; }
.custom-range button { width: auto; flex: 0 0 auto; }

.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  min-width: 560px;
}

th, td {
  text-align: right;
  padding: 8px 10px;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

th:first-child, td:first-child { text-align: left; }

tfoot td { font-weight: 700; border-top: 2px solid var(--color-text); border-bottom: none; }

.profit-positive { color: var(--color-success); }
.profit-negative { color: var(--color-danger); }

.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.login-card { max-width: 360px; width: 100%; }
.login-card h1 { text-align: center; margin-bottom: 20px; font-size: 1.3rem; }

@media (min-width: 480px) {
  button, .btn { width: auto; }
}