/* SSAR Techs — one stylesheet for every page. */

:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #555555;
  --accent: #0b5cad;
  --border: #d0d7de;
  --panel: #f4f6f8;
  --header-bg: #13304f;
  --header-text: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121417;
    --text: #e8e8e8;
    --muted: #a8a8a8;
    --accent: #6cb4ff;
    --border: #33393f;
    --panel: #1c2026;
    --header-bg: #0b1a2b;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 18px;
  line-height: 1.55;
}

/* Header and navigation */

.site-header {
  background: var(--header-bg);
  color: var(--header-text);
  padding: 12px 16px;
}

.site-header .inner,
main,
.site-footer {
  max-width: 760px;
  margin: 0 auto;
}

.site-name {
  display: inline-block;
  color: var(--header-text);
  font-size: 1.3rem;
  font-weight: 700;
  text-decoration: none;
  margin-bottom: 6px;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

nav a {
  display: inline-block;
  color: var(--header-text);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.1);
}

nav a:hover,
nav a:focus {
  background: rgba(255, 255, 255, 0.25);
}

nav a[aria-current="page"] {
  background: #ffffff;
  color: #13304f;
  font-weight: 600;
}

/* Main content */

main {
  padding: 20px 16px 40px;
}

h1 {
  font-size: 1.7rem;
  line-height: 1.25;
  margin: 0.4em 0 0.5em;
}

h2 {
  font-size: 1.3rem;
  margin: 1.6em 0 0.5em;
}

h3 {
  font-size: 1.1rem;
  margin: 1.2em 0 0.4em;
}

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

.lead {
  font-size: 1.1rem;
  color: var(--muted);
}

.note {
  background: var(--panel);
  border-left: 4px solid var(--accent);
  padding: 10px 14px;
  margin: 1em 0;
}

/* Link lists (home page and Tech Links) */

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

.link-list li {
  border-bottom: 1px solid var(--border);
}

.link-list a {
  display: block;
  padding: 12px 4px;
  font-weight: 600;
  text-decoration: none;
}

.link-list a:hover,
.link-list a:focus {
  text-decoration: underline;
}

.link-list .desc {
  display: block;
  font-weight: 400;
  font-size: 0.95rem;
  color: var(--muted);
}

/* Flow charts */

.flowchart {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px 16px 12px;
  margin: 1.2em 0;
}

.flowchart ol {
  padding-left: 1.4em;
}

.flowchart li {
  margin-bottom: 0.8em;
}

.yes,
.no {
  display: block;
  padding-left: 0.5em;
}

.yes::before {
  content: "YES → ";
  font-weight: 700;
  color: #1a7f37;
}

.no::before {
  content: "NO → ";
  font-weight: 700;
  color: #cf222e;
}

@media (prefers-color-scheme: dark) {
  .yes::before { color: #56d364; }
  .no::before { color: #ff7b72; }
}

/* Visual flow chart diagrams (boxes, arrows and yes/no branches) */

.chart {
  --box-bg: #ffffff;
  --ask-bg: #fff4d6;
  --ask-border: #c99a06;
  --ok-bg: #e6f4ea;
  --ok-border: #1a7f37;
  --bad-bg: #fdecea;
  --bad-border: #cf222e;
  --line: #6e7781;
  margin: 1.2em 0;
  font-size: 1rem;
}

@media (prefers-color-scheme: dark) {
  .chart {
    --box-bg: #1c2026;
    --ask-bg: #3a2f0b;
    --ask-border: #d4a72c;
    --ok-bg: #12301c;
    --ok-border: #56d364;
    --bad-bg: #3b1416;
    --bad-border: #ff7b72;
    --line: #8b949e;
  }
}

.chart .box {
  background: var(--box-bg);
  border: 2px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  text-align: center;
}

.chart .box p {
  margin: 0.3em 0;
}

.chart .box ul {
  text-align: left;
  margin: 0.4em 0;
  padding-left: 1.2em;
}

.chart .start {
  border-radius: 999px;
  border-color: var(--accent);
  font-weight: 700;
}

.chart .step-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Decision: a pointed "diamond" box */
.chart .ask {
  background: var(--ask-border);
  border: 0;
  padding: 2px;
  clip-path: polygon(18px 0, calc(100% - 18px) 0, 100% 50%, calc(100% - 18px) 100%, 18px 100%, 0 50%);
}

.chart .ask > span {
  display: block;
  background: var(--ask-bg);
  padding: 12px 26px;
  font-weight: 700;
  text-align: center;
  clip-path: polygon(17px 0, calc(100% - 17px) 0, 100% 50%, calc(100% - 17px) 100%, 17px 100%, 0 50%);
}

.chart .ok {
  background: var(--ok-bg);
  border-color: var(--ok-border);
}

.chart .bad {
  background: var(--bad-bg);
  border-color: var(--bad-border);
}

.chart a.box {
  display: block;
  text-decoration: none;
}

.chart .goto {
  border-style: dashed;
  border-color: var(--accent);
  font-weight: 700;
}

/* Down arrow between boxes */
.chart .arrow {
  position: relative;
  height: 28px;
}

.chart .arrow::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 8px;
  border-left: 2px solid var(--line);
  transform: translateX(-1px);
}

.chart .arrow::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-7px);
  border-left: 7px solid transparent;
  border-right: 7px solid transparent;
  border-top: 9px solid var(--line);
}

/* Arrow that continues from the right-hand (NO) branch */
.chart .arrow-right::before,
.chart .arrow-right::after {
  left: calc(75% + 3px);
}

/* Yes / no split under a decision */
.chart .branches {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.chart .branch {
  display: flex;
  flex-direction: column;
}

.chart .branch > .box {
  flex: 1;
}

.chart .branch-label {
  text-align: center;
  font-weight: 700;
  padding-top: 4px;
}

.chart .branch-yes .branch-label { color: var(--ok-border); }
.chart .branch-no .branch-label { color: var(--bad-border); }

.chart .stage {
  scroll-margin-top: 12px;
  margin-top: 1.6em;
}

@media (max-width: 380px) {
  .chart { font-size: 0.95rem; }
  .chart .box { padding: 8px; }
}

/* Footer */

.site-footer {
  padding: 16px;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--muted);
}