/* New Perk Tools — shared styles (brand: New_Perk_Brand_System.md) */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy: #0B1F33;
  --navy-dark: #122B45;
  --white: #ffffff;
  --gray-light: #E5E7EB;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-400: #9CA3AF;
  --gray-600: #4B5563;
  --gray-700: #374151;
  --gray-900: #111827;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Montserrat', 'Inter', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--gray-700);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

h1 { font-size: 34px; line-height: 1.2; font-weight: 700; color: var(--navy); }
h2 { font-size: 24px; line-height: 1.25; font-weight: 700; color: var(--navy); }
h3 { font-size: 17px; line-height: 1.4; font-weight: 600; color: var(--navy); }
p, li { line-height: 1.65; }
a { color: var(--navy); }

.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* Header */
.header { border-bottom: 1px solid var(--gray-light); background: var(--white); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 24px; max-width: 1280px; margin: 0 auto; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo img { width: 36px; height: 36px; }
.logo-text { font-weight: 700; font-size: 17px; letter-spacing: 0.06em; color: var(--navy); }
.logo-sub { font-weight: 500; font-size: 13px; color: var(--gray-600); letter-spacing: 0.04em; }
.header nav { display: flex; gap: 20px; align-items: center; font-size: 14px; font-weight: 500; }
.header nav a { text-decoration: none; color: var(--gray-700); }
.header nav a:hover { color: var(--navy); }
.header nav a.btn-primary, .header nav a.btn-primary:hover { color: var(--white); }

.btn { display: inline-block; padding: 10px 22px; font: inherit; font-size: 14px; font-weight: 600; border-radius: 4px; border: none; cursor: pointer; text-decoration: none; transition: background-color .2s ease; }
.btn-primary { background: var(--navy); color: var(--white); }
.btn-primary:hover { background: var(--navy-dark); }
.btn-outline { background: var(--white); color: var(--navy); border: 1px solid var(--navy); }
.btn-outline:hover { background: var(--gray-100); }

/* Page intro */
.intro { padding-top: 48px; padding-bottom: 24px; }
.eyebrow { font-size: 12px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--gray-600); margin-bottom: 12px; }
.intro p.lead { max-width: 720px; margin-top: 14px; font-size: 17px; color: var(--gray-600); }

/* Calculator layout */
.calc { display: grid; grid-template-columns: minmax(0, 360px) minmax(0, 1fr); gap: 24px; padding-bottom: 48px; align-items: start; }
.panel { border: 1px solid var(--gray-light); border-radius: 6px; background: var(--white); padding: 20px; }
.panel + .panel { margin-top: 16px; }
.panel h2 { font-size: 15px; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 14px; }

.presets { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.chip { font: inherit; font-size: 12px; font-weight: 600; padding: 6px 10px; border-radius: 999px; border: 1px solid var(--gray-light); background: var(--gray-50); color: var(--navy); cursor: pointer; }
.chip:hover, .chip.active { border-color: var(--navy); background: var(--navy); color: var(--white); }

fieldset { border: none; margin-bottom: 18px; }
legend { font-size: 12px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--gray-600); margin-bottom: 10px; }
.field { margin-bottom: 12px; }
.field label { display: flex; justify-content: space-between; gap: 8px; font-size: 14px; font-weight: 600; color: var(--gray-900); margin-bottom: 4px; }
.field label .hint { font-weight: 400; color: var(--gray-400); font-size: 12px; }
.field input[type=number], .field select { width: 100%; font: inherit; font-size: 15px; padding: 9px 11px; border: 1px solid var(--gray-light); border-radius: 4px; color: var(--gray-900); background: var(--white); }
.field input:focus, .field select:focus { outline: 2px solid var(--navy); outline-offset: -1px; border-color: var(--navy); }
.field .help { font-size: 12px; color: var(--gray-600); margin-top: 4px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.check { display: flex; gap: 8px; align-items: flex-start; font-size: 14px; color: var(--gray-900); }
.check input { margin-top: 4px; accent-color: var(--navy); }
.error { display: none; font-size: 13px; color: #8a1c1c; background: #fdf2f2; border: 1px solid #f3caca; border-radius: 4px; padding: 8px 10px; margin-bottom: 12px; }

/* Results */
.kpis { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.kpi { background: var(--gray-50); border: 1px solid var(--gray-light); border-radius: 6px; padding: 14px; min-width: 0; }
.kpi .k-label { font-size: 12px; font-weight: 600; color: var(--gray-600); }
.kpi .k-value { font-size: 26px; font-weight: 700; color: var(--navy); line-height: 1.2; margin-top: 4px; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.kpi .k-sub { font-size: 12px; color: var(--gray-600); margin-top: 2px; }
.kpi.primary { background: var(--navy); border-color: var(--navy); }
.kpi.primary .k-label, .kpi.primary .k-sub { color: #c7d0db; }
.kpi.primary .k-value { color: var(--white); }

.chart-wrap { margin-top: 18px; }
.chart-wrap svg { width: 100%; height: auto; display: block; }
.chart-caption { font-size: 12px; color: var(--gray-600); margin-top: 6px; }

table.data { width: 100%; border-collapse: collapse; font-size: 14px; font-variant-numeric: tabular-nums; }
table.data th, table.data td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--gray-light); }
table.data th { font-size: 12px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--gray-600); }
table.data td.num, table.data th.num { text-align: right; }
table.data td.num { white-space: nowrap; }
.table-scroll { overflow-x: auto; }

.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.disclosure { width: 100%; min-height: 170px; font: inherit; font-size: 13px; padding: 10px; border: 1px solid var(--gray-light); border-radius: 4px; background: var(--gray-50); color: var(--gray-900); resize: vertical; margin-top: 10px; }
.toast { font-size: 13px; color: var(--gray-600); align-self: center; }

/* Article */
.article { border-top: 1px solid var(--gray-light); padding: 48px 0; }
.article .cols { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px 48px; }
.article h2 { margin-bottom: 12px; }
.article h3 { margin: 18px 0 6px; }
.article p + p { margin-top: 10px; }
.article ul { padding-left: 20px; margin-top: 8px; }
.formula { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; background: var(--gray-100); border-radius: 4px; padding: 10px 12px; margin: 10px 0; overflow-x: auto; }
details { border-bottom: 1px solid var(--gray-light); padding: 14px 0; }
details summary { font-weight: 600; color: var(--navy); cursor: pointer; }
details p { margin-top: 8px; }

/* Soft CTA */
.more { background: var(--gray-100); padding: 40px 0; }
.more-inner { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.more-card { background: var(--white); border: 1px solid var(--gray-light); border-radius: 6px; padding: 20px; display: flex; flex-direction: column; gap: 8px; }
.more-card p { font-size: 14px; color: var(--gray-600); flex: 1; }
.more-card a.link { font-weight: 600; font-size: 14px; }
.more h2 { font-size: 18px; margin-bottom: 14px; }

.footer { padding: 24px 0; font-size: 13px; color: var(--gray-600); }
.footer .container { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.footer a { color: var(--gray-600); }

/* Tool cards (index) */
.tool-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; padding-bottom: 48px; }
.tool-card { border: 1px solid var(--gray-light); border-radius: 6px; padding: 20px; text-decoration: none; display: flex; flex-direction: column; gap: 8px; }
.tool-card:hover { border-color: var(--navy); }
.tool-card p { font-size: 14px; color: var(--gray-600); }
.tool-card .tag { font-size: 11px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--gray-400); }

/* Single-column tools (wide tables) */
.stack { display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; padding-bottom: 48px; }
.stack .panel + .panel { margin-top: 0; }
.settings { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 4px 16px; }

/* Editable table */
table.edit { width: 100%; border-collapse: collapse; font-size: 14px; font-variant-numeric: tabular-nums; }
table.edit th { text-align: left; font-size: 12px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--gray-600); padding: 6px 6px; border-bottom: 1px solid var(--gray-light); }
table.edit td { padding: 6px; border-bottom: 1px solid var(--gray-light); }
table.edit input { width: 100%; min-width: 80px; font: inherit; font-size: 15px; padding: 8px 10px; border: 1px solid var(--gray-light); border-radius: 4px; color: var(--gray-900); }
table.edit select { width: 100%; min-width: 110px; font: inherit; font-size: 14px; padding: 8px 6px; border: 1px solid var(--gray-light); border-radius: 4px; color: var(--gray-900); background: var(--white); }
table.edit input[type=text] { min-width: 140px; }
table.edit select[data-k=place] { min-width: 140px; }
table.edit input:focus, table.edit select:focus { outline: 2px solid var(--navy); outline-offset: -1px; border-color: var(--navy); }
.icon-btn { font: inherit; font-size: 18px; line-height: 1; width: 34px; height: 34px; border: 1px solid var(--gray-light); border-radius: 4px; background: var(--white); color: var(--gray-600); cursor: pointer; }
.icon-btn:hover { border-color: var(--navy); color: var(--navy); }

/* Flags and checks */
.flag { display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: 0.04em; padding: 3px 8px; border-radius: 999px; white-space: nowrap; }
.flag.ok { background: var(--gray-100); color: var(--gray-600); }
.flag.warn { background: #fdf6e7; color: #7a5400; }
.flag.bad { background: #fdf2f2; color: #8a1c1c; }
ul.checks { list-style: none; padding: 0; display: grid; gap: 8px; }
ul.checks li { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; line-height: 1.5; }
ul.checks li .flag { margin-top: 1px; }
details.gen { border: none; padding: 0; margin-top: 14px; }
details.gen summary { font-size: 14px; }
details.gen .settings { margin-top: 12px; }

/* Related tools */
.inline-cta { font-size: 14px; color: var(--gray-600); margin-top: 14px; }
.inline-cta a { font-weight: 600; }
.related { display: flex; flex-wrap: wrap; gap: 8px 16px; font-size: 14px; margin-top: 12px; }

@media (max-width: 860px) {
  .calc { grid-template-columns: minmax(0, 1fr); }
  .article .cols, .more-inner { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 560px) {
  .container, .header-inner { padding-left: 16px; padding-right: 16px; }
  h1 { font-size: 27px; }
  .kpis { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .kpi.primary { grid-column: 1 / -1; }
  .kpi .k-value { font-size: 21px; }
  table.data { font-size: 13px; }
  table.data th, table.data td { padding: 8px 6px; }
  .header nav .hide-sm { display: none; }
  .logo-sub { display: none; }
  table.edit input { min-width: 0; padding: 8px 6px; }
  table.edit input[type=text] { min-width: 120px; }
  table.edit select { min-width: 96px; }
  table.edit td, table.edit th { padding: 4px 3px; }
}
@media print {
  .header nav, .more, .actions, .presets { display: none; }
}