/* =========================================================
   Personal Financial Planning Scenario Planner — Styles
   Design goals: clean, professional, accessible, responsive,
   good color contrast, no stock imagery, minimal animation.
   ========================================================= */

:root {
  --color-bg: #f7f8fa;
  --color-surface: #ffffff;
  --color-text: #1a1f2b;
  --color-text-muted: #4b5563;
  --color-primary: #145c46;
  --color-primary-dark: #0d3f30;
  --color-accent: #1d6fa5;
  --color-border: #d7dbe0;
  --color-success-bg: #e6f4ea;
  --color-success-text: #14532d;
  --color-warning-bg: #fdecea;
  --color-warning-text: #7a1f1f;
  --color-disclaimer-bg: #fff8e6;
  --color-disclaimer-border: #d8a900;
  --focus-ring: #0b57d0;

  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 10px;
  --shadow-card: 0 1px 3px rgba(20, 30, 40, 0.08), 0 1px 2px rgba(20, 30, 40, 0.06);
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.55;
  font-size: 16px;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

h1, h2, h3 {
  line-height: 1.25;
  color: var(--color-primary-dark);
}

h1 {
  font-size: 1.7rem;
  margin: 0 0 0.4rem;
}

h2 {
  font-size: 1.25rem;
  margin: 0 0 0.5rem;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 0.4rem;
}

h3 {
  font-size: 1.05rem;
  margin: 1.75rem 0 0.35rem;
}

a {
  color: var(--color-accent);
}

/* Skip link for keyboard users */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 100;
  border-radius: 0 0 6px 0;
}
.skip-link:focus {
  left: 0;
}

/* Visible, consistent focus ring everywhere */
a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

.site-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  padding: 2rem 0 1.75rem;
}
.site-header h1 {
  color: #fff;
}
.subtitle {
  margin: 0 0 0.6rem;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: #b7ddc9;
}

.tagline {
  margin: 0;
  max-width: 60ch;
  color: #eaf3ef;
  font-size: 1.02rem;
}

.disclaimer {
  background: var(--color-disclaimer-bg);
  border: 1px solid var(--color-disclaimer-border);
  border-left-width: 6px;
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  margin: 1.25rem 0;
  font-size: 0.95rem;
  color: #4a3b00;
}

main {
  padding-bottom: 3rem;
}

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.section-help {
  color: var(--color-text-muted);
  margin-top: 0;
  font-size: 0.95rem;
}

/* Form grid layout */
.grid {
  display: grid;
  gap: 1.1rem 1.5rem;
}
.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}
.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 640px) {
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }
}

.field {
  display: flex;
  flex-direction: column;
}

.field label {
  font-weight: 600;
  margin-bottom: 0.35rem;
  font-size: 0.95rem;
}

.field input[type="number"] {
  font-size: 1rem;
  padding: 0.55rem 0.65rem;
  border: 1.5px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-surface);
  color: var(--color-text);
  width: 100%;
}

.field input[type="number"]:focus {
  border-color: var(--focus-ring);
}

.field input[aria-invalid="true"] {
  border-color: #b3261e;
  background: #fff5f5;
}

.field-error {
  color: #b3261e;
  font-size: 0.85rem;
  margin: 0.3rem 0 0;
  min-height: 1.1em;
}

/* Tooltips built from native <details>/<summary> — accessible, no JS needed */
.tooltip {
  margin-top: 0.35rem;
  font-size: 0.85rem;
}
.tooltip summary {
  cursor: pointer;
  color: var(--color-accent);
  font-weight: 500;
  list-style: none;
}
.tooltip summary::-webkit-details-marker {
  display: none;
}
.tooltip summary::before {
  content: "ⓘ ";
}
.tooltip p {
  margin: 0.4rem 0 0;
  color: var(--color-text-muted);
  background: #f1f5f3;
  border-radius: 6px;
  padding: 0.55rem 0.7rem;
}

/* Scenario cards */
.scenario-choices {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.25rem;
}
@media (max-width: 640px) {
  .scenario-choices {
    grid-template-columns: 1fr;
  }
}
.scenario-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  cursor: pointer;
  background: var(--color-surface);
}
.scenario-card input {
  position: absolute;
  top: 0.9rem;
  right: 0.9rem;
}
.scenario-card:has(input:checked) {
  border-color: var(--color-primary);
  background: var(--color-success-bg);
}
.scenario-title {
  font-weight: 700;
  font-size: 1.05rem;
  padding-right: 1.5rem;
}
.scenario-desc {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

fieldset.assumptions-fieldset {
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem 0.5rem;
  margin: 0;
}
fieldset.assumptions-fieldset legend {
  font-weight: 600;
  padding: 0 0.4rem;
  color: var(--color-primary-dark);
}

/* Buttons */
.action-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0 2rem;
}
.btn {
  font-size: 1rem;
  font-weight: 600;
  padding: 0.65rem 1.2rem;
  border-radius: 8px;
  border: 2px solid var(--color-primary);
  background: var(--color-primary);
  color: #fff;
  cursor: pointer;
}
.btn:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary-dark);
}
.btn-secondary:hover {
  background: var(--color-success-bg);
}

/* Results */
.warning-banner {
  background: var(--color-warning-bg);
  color: var(--color-warning-text);
  border: 1px solid #f1b3ad;
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 0.5rem;
}
@media (max-width: 780px) {
  .results-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 480px) {
  .results-grid {
    grid-template-columns: 1fr;
  }
}

.result-card {
  background: #f4f7f6;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.result-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 600;
}
.result-value {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}
.result-card-status .result-value.status-good {
  color: var(--color-success-text);
}
.result-card-status .result-value.status-bad {
  color: var(--color-warning-text);
}

.calc-explainer {
  margin: 1rem 0 0;
  font-size: 0.92rem;
}
.calc-explainer summary {
  cursor: pointer;
  color: var(--color-accent);
  font-weight: 600;
}
.calc-explainer p {
  color: var(--color-text-muted);
  max-width: 75ch;
}

.chart-wrapper {
  width: 100%;
  background: #fbfcfc;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.75rem;
}
canvas {
  width: 100%;
  height: 320px;
  display: block;
}

.chart-data-table {
  margin: 0.6rem 0 0;
  font-size: 0.9rem;
}
.chart-data-table summary {
  cursor: pointer;
  color: var(--color-accent);
  font-weight: 600;
}

.table-scroll {
  overflow-x: auto;
  margin-top: 0.6rem;
}
table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.9rem;
}
caption {
  text-align: left;
  font-weight: 600;
  margin-bottom: 0.4rem;
}
th, td {
  border: 1px solid var(--color-border);
  padding: 0.45rem 0.6rem;
  text-align: left;
}
thead th {
  background: #eef2f0;
}

.comparison-table td.status-good {
  color: var(--color-success-text);
  font-weight: 600;
}
.comparison-table td.status-bad {
  color: var(--color-warning-text);
  font-weight: 600;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 0 2.5rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* Print styles: clean, single-column, no buttons/nav */
@media print {
  .site-header {
    background: none;
    color: var(--color-text);
    padding: 0;
  }
  .site-header h1 {
    color: var(--color-text);
  }
  .subtitle {
    color: var(--color-text-muted);
  }
  .tagline {
    color: var(--color-text-muted);
  }
  .action-bar,
  .skip-link,
  #planner-form fieldset.assumptions-fieldset .tooltip,
  .tooltip {
    display: none !important;
  }
  #planner-form {
    display: none;
  }
  .panel {
    box-shadow: none;
    border: 1px solid #999;
    break-inside: avoid;
  }
  body {
    background: #fff;
  }
}