/* Arnold IT Manual — technical-manual style, light and dark.
 * Dark follows the visitor's system unless they chose a theme with the
 * header switch: <html data-theme="light|dark"> (set before paint in head.php). */
:root {
  color-scheme: light;
  --bg: #f2f4f1; --surface: #ffffff; --ink: #17211a; --muted: #55625a; --rule: #d3dbd4;
  --accent: #1b6b36; --accent-soft: #e2efe5; --code-bg: #e9eee9; --on-accent: #ffffff;
  --shadow: 0 10px 28px rgba(23, 33, 26, .12);
  --display: "IBM Plex Sans Condensed", "Arial Narrow", system-ui, sans-serif;
  --body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", Consolas, monospace;
}
:root[data-theme="dark"] {
  color-scheme: dark; --bg: #0b0f0c; --surface: #121914; --ink: #dce6de; --muted: #93a598;
  --rule: #25322a; --accent: #4bd977; --accent-soft: #15301d; --code-bg: #1a241d; --on-accent: #0b0f0c;
  --shadow: 0 10px 28px rgba(0, 0, 0, .45);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark; --bg: #0b0f0c; --surface: #121914; --ink: #dce6de; --muted: #93a598;
    --rule: #25322a; --accent: #4bd977; --accent-soft: #15301d; --code-bg: #1a241d; --on-accent: #0b0f0c;
    --shadow: 0 10px 28px rgba(0, 0, 0, .45);
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.aim { margin: 0; background: var(--bg); color: var(--ink); font: 400 16px/1.62 var(--body); -webkit-font-smoothing: antialiased; }
.aim a { color: var(--accent); }
.aim .page { max-width: 1180px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 40px) 72px; }

/* accessibility helpers */
.aim .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.aim .skip-link { position: absolute; left: 16px; top: -64px; z-index: 100; background: var(--accent); color: var(--on-accent); padding: 10px 14px; border-radius: 4px; font: 600 13px/1 var(--mono); text-decoration: none; }
.aim .skip-link:focus { top: 12px; }
.aim a:focus-visible, .aim button:focus-visible, .aim input:focus-visible, .aim textarea:focus-visible, .aim select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }
.aim main:focus { outline: none; }

/* top bar */
.aim .topbar { position: relative; z-index: 20; border-bottom: 1px solid var(--rule); background: var(--surface); }
.aim .topbar-in { max-width: 1180px; margin: 0 auto; padding: 10px clamp(16px, 4vw, 40px); display: flex; align-items: center; gap: 10px 16px; flex-wrap: wrap; }
.aim .brand { display: flex; align-items: center; gap: 10px; margin-right: auto; text-decoration: none; color: var(--ink); font: 700 20px/1 var(--display); }
.aim .brand img { height: 36px; width: auto; }
.aim .topnav { font: 600 12px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.aim .topnav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 4px; flex-wrap: wrap; }
.aim .topnav a { display: block; color: var(--muted); text-decoration: none; padding: 8px 10px; border-radius: 4px; }
.aim .topnav a:hover, .aim .topnav a.current { color: var(--accent); background: var(--accent-soft); }
.aim .topnav .has-sub { position: relative; }
.aim .topnav .sub { display: none; position: absolute; top: 100%; left: 0; z-index: 30; min-width: 220px; margin: 0; padding: 6px; flex-direction: column; gap: 2px; background: var(--surface); border: 1px solid var(--rule); border-radius: 6px; box-shadow: var(--shadow); }
.aim .topnav .has-sub:hover > .sub, .aim .topnav .has-sub:focus-within > .sub { display: flex; }
.aim .topnav .sub a { padding: 10px 12px; }

.aim .tools { display: flex; align-items: center; gap: 8px; }
.aim .langswitch { display: flex; align-items: center; font: 600 12px/1 var(--mono); letter-spacing: .08em; }
.aim .langswitch a, .aim .langswitch .on, .aim .langswitch .off { padding: 9px 6px; border-radius: 4px; text-decoration: none; }
.aim .langswitch a { color: var(--muted); }
.aim .langswitch a:hover { color: var(--accent); background: var(--accent-soft); }
.aim .langswitch .on { color: var(--ink); text-decoration: underline; text-decoration-color: var(--accent); text-decoration-thickness: 2px; text-underline-offset: 5px; }
.aim .langswitch .off { color: var(--muted); opacity: .55; }
.aim .langswitch .sep { color: var(--rule); padding: 0 1px; }
.aim .iconbtn { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; padding: 0; border: 1px solid var(--rule); border-radius: 6px; background: var(--surface); color: var(--ink); cursor: pointer; }
.aim .iconbtn:hover { color: var(--accent); border-color: var(--accent); }
.aim .iconbtn svg { width: 18px; height: 18px; display: block; }
.aim .themetoggle .i-sun { display: none; }
:root[data-theme="dark"] .aim .themetoggle .i-sun { display: block; }
:root[data-theme="dark"] .aim .themetoggle .i-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .aim .themetoggle .i-sun { display: block; }
  :root:not([data-theme="light"]) .aim .themetoggle .i-moon { display: none; }
}
.aim .menutoggle { display: none; }

/* cover */
.aim .cover { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 18px 40px; align-items: center; padding: 56px 0 40px; border-bottom: 1px solid var(--rule); margin-bottom: 40px; }
.aim .cover-text { display: grid; gap: 18px; min-width: 0; }
.aim .cover-logo img { width: clamp(120px, 18vw, 220px); height: auto; display: block; }
.aim .eyebrow { font: 600 12px/1.4 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--accent); margin: 0; }
.aim .cover h1 { font: 700 clamp(40px, 9vw, 88px)/.95 var(--display); letter-spacing: -.01em; margin: 0; overflow-wrap: break-word; hyphens: auto; }
.aim .subtitle { font: 500 clamp(22px, 3.4vw, 30px)/1.2 var(--display); color: var(--muted); margin: 0; }
.aim .lede { max-width: 62ch; margin: 6px 0 0; font-size: 17px; }
.aim .readers { display: flex; flex-wrap: wrap; gap: 10px 28px; font-size: 14px; color: var(--muted); }
.aim .readers b { color: var(--ink); font-weight: 600; }
.aim .indicators { display: flex; flex-wrap: wrap; gap: 6px; }
.aim .pill { font: 600 11px/1 var(--mono); letter-spacing: .06em; padding: 5px 9px; border-radius: 999px; border: 1px solid var(--rule); color: var(--muted); background: var(--surface); }
.aim .pill.on { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }

/* layout */
.aim .layout { display: grid; grid-template-columns: 230px minmax(0,1fr); gap: 56px; align-items: start; }
.aim nav.toc { position: sticky; top: 24px; font-size: 14px; }
.aim nav.toc h2 { font: 600 12px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin: 0 0 12px; }
.aim nav.toc ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.aim nav.toc a { display: grid; grid-template-columns: 2.2em 1fr; padding: 5px 10px 5px 8px; border-left: 2px solid transparent; color: var(--ink); text-decoration: none; border-radius: 0 4px 4px 0; }
.aim nav.toc a span { font: 400 12px/1.9 var(--mono); color: var(--muted); }
.aim nav.toc a:hover { background: var(--accent-soft); }
.aim nav.toc a.active { border-left-color: var(--accent); background: var(--accent-soft); font-weight: 600; }
.aim main { max-width: 760px; min-width: 0; }

/* chapters */
.aim section.level1 { margin-bottom: 48px; scroll-margin-top: 16px; }
.aim section.level1 > h1 { display: flex; align-items: baseline; gap: 14px; font: 600 34px/1.15 var(--display); margin: 0 0 18px; padding-bottom: 12px; border-bottom: 2px solid var(--ink); }
.aim .num { font: 600 .55em/1 var(--mono); color: var(--accent); min-width: 2.2em; }
.aim section.level2 { scroll-margin-top: 16px; }
.aim section.level2 > h2 { display: flex; align-items: baseline; gap: 10px; font: 600 22px/1.25 var(--display); margin: 30px 0 10px; }
.aim section.level2 > h2 .num { font-size: .62em; min-width: 2.6em; }
.aim p, .aim main ul, .aim main ol { margin: 0 0 14px; }
.aim main ul, .aim main ol { padding-left: 1.3em; }
.aim main li { margin-bottom: 5px; }
.aim main li::marker { color: var(--accent); }
.aim strong { font-weight: 600; }
.aim code { font: 400 .9em/1 var(--mono); background: var(--code-bg); padding: 2px 5px; border-radius: 3px; }

/* tables */
.aim .table-wrap { overflow-x: auto; margin: 6px 0 22px; border: 1px solid var(--rule); border-radius: 6px; background: var(--surface); }
.aim table { border-collapse: collapse; width: 100%; font-size: 14.5px; line-height: 1.5; }
.aim th, .aim td { text-align: left; vertical-align: top; padding: 9px 14px; border-bottom: 1px solid var(--rule); }
.aim thead th { font: 600 11.5px/1.3 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); background: var(--bg); }
.aim tbody tr:last-child td { border-bottom: 0; }
.aim td:first-child { font-weight: 600; white-space: nowrap; }

/* callout + buttons */
.aim blockquote { margin: 18px 0; padding: 14px 18px; border-left: 3px solid var(--accent); background: var(--accent-soft); border-radius: 0 6px 6px 0; }
.aim blockquote p:last-child { margin-bottom: 0; }
.aim .btn { display: inline-block; font: 600 12px/1.2 var(--mono); letter-spacing: .1em; text-transform: uppercase; padding: 12px 16px; border-radius: 4px; background: var(--accent); color: var(--on-accent); text-decoration: none; border: 1px solid var(--accent); }
.aim .btn.ghost { background: transparent; color: var(--accent); }
.aim .btn:hover { filter: brightness(1.1); }
.aim .actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 8px; }

/* software: program cards, feature tiles, check list */
.aim .jit-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 16px; margin: 8px 0; }
.aim .jit-card { display: flex; flex-direction: column; gap: 10px; padding: 20px; background: var(--surface); border: 1px solid var(--rule); border-radius: 8px; color: var(--ink); text-decoration: none; transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease; }
.aim .jit-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow); }
.aim .jit-card h2 { font: 600 22px/1.2 var(--display); margin: 2px 0 0; color: var(--ink); }
.aim .jit-card p { margin: 0; color: var(--muted); font-size: 15px; }
.aim .jit-more { margin-top: auto; padding-top: 6px; font: 600 12px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }
.aim .jit-icon { display: inline-flex; flex: none; align-items: center; justify-content: center; width: 44px; height: 44px; border-radius: 8px; background: var(--accent-soft); color: var(--accent); }
.aim .jit-icon svg { width: 24px; height: 24px; display: block; }
.aim .jit-features { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; margin: 14px 0 8px; }
.aim .jit-feature { padding: 18px; background: var(--surface); border: 1px solid var(--rule); border-radius: 8px; min-width: 0; }
.aim .jit-feature h2 { font: 600 19px/1.25 var(--display); margin: 12px 0 8px; }
.aim .jit-feature ul { margin: 0; padding-left: 1.1em; font-size: 15px; }
.aim .jit-feature li:last-child { margin-bottom: 0; }
.aim main ul.jit-checks { list-style: none; padding-left: 0; display: grid; gap: 8px; }
.aim .jit-checks li { position: relative; padding-left: 32px; margin: 0; }
.aim .jit-checks li::before { content: ""; position: absolute; left: 0; top: 3px; width: 20px; height: 20px; border-radius: 50%; background: var(--accent-soft); border: 1px solid var(--accent); }
.aim .jit-checks li::after { content: ""; position: absolute; left: 7px; top: 7px; width: 5px; height: 9px; border: solid var(--accent); border-width: 0 2px 2px 0; transform: rotate(45deg); }

/* screenshots: framed, linked to the full-size image */
.aim .jit-shot { margin: 6px 0 30px; min-width: 0; }
.aim .jit-shot a { display: block; border: 1px solid var(--rule); border-radius: 8px; overflow: hidden; background: var(--surface); box-shadow: var(--shadow); cursor: zoom-in; transition: border-color .15s ease; }
.aim .jit-shot a:hover { border-color: var(--accent); }
.aim .jit-shot img { display: block; width: 100%; height: auto; }
.aim .jit-shot figcaption { margin-top: 10px; font-size: 14px; line-height: 1.5; color: var(--muted); }
.aim .jit-zoom { font: 600 11px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); white-space: nowrap; margin-left: 4px; }
.aim .jit-shots-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; align-items: start; margin: 6px 0 30px; }
.aim .jit-shots-2 .jit-shot { margin: 0; }

/* Reach Out: unique selling point + app/server diagram */
.aim .jit-usp { margin: 0 0 30px; padding: 22px clamp(16px, 3vw, 26px) 20px; border: 1px solid var(--accent); border-radius: 10px; background: var(--accent-soft); }
.aim .jit-usp h2 { font: 600 clamp(23px, 3.2vw, 30px)/1.15 var(--display); margin: 8px 0 12px; }
.aim .jit-usp .jit-checks { margin: 0 0 20px; }
.aim .jit-arch { margin: 0; padding: 18px clamp(12px, 2.4vw, 22px); background: var(--surface); border: 1px solid var(--rule); border-radius: 8px; }
.aim .jit-arch-top { display: grid; grid-template-columns: minmax(0, 1fr) minmax(64px, .9fr) minmax(0, 1fr); align-items: stretch; }
.aim .jit-arch-node { display: flex; flex-direction: column; align-items: center; gap: 4px; min-width: 0; padding: 14px 10px; text-align: center; border: 1.5px solid var(--accent); border-radius: 8px; background: var(--bg); color: var(--ink); }
.aim .jit-arch-node svg { width: 30px; height: 30px; color: var(--accent); }
.aim .jit-arch-node b { font: 600 16px/1.2 var(--display); }
.aim .jit-arch-node span { font-size: 13px; line-height: 1.4; color: var(--muted); }
.aim .jit-arch-node em { margin-top: 4px; font: 600 11px/1.45 var(--mono); letter-spacing: .04em; font-style: normal; color: var(--accent); }
.aim .jit-arch-direct { position: relative; align-self: center; border-top: 2px dashed var(--accent); }
.aim .jit-arch-direct span { position: absolute; left: 0; right: 0; bottom: 8px; padding: 0 4px; text-align: center; font: 600 11px/1.3 var(--mono); color: var(--muted); }
.aim .jit-arch-bus { position: relative; height: 26px; margin: 0 17%; border: 2px solid var(--accent); border-top: 0; border-radius: 0 0 10px 10px; }
.aim .jit-arch-bus::after { content: ""; position: absolute; left: 50%; top: 100%; height: 22px; border-left: 2px solid var(--accent); transform: translateX(-1px); }
.aim .jit-arch-server { max-width: 440px; margin: 22px auto 0; }
.aim .jit-arch figcaption { margin-top: 14px; font-size: 13.5px; line-height: 1.5; color: var(--muted); text-align: center; }
@media (max-width: 520px) {
  .aim .jit-arch-top { grid-template-columns: minmax(0, 1fr) 28px minmax(0, 1fr); }
  .aim .jit-arch-direct span { display: none; }
  .aim .jit-arch-node { padding: 12px 6px; }
}

/* forms (Forminator) */
.aim .form-panel { border: 1px solid var(--rule); border-radius: 6px; background: var(--surface); padding: 20px; margin: 8px 0 22px; }
.aim .form-panel input, .aim .form-panel textarea, .aim .form-panel select { font: inherit; }

.aim .colophon { max-width: 1180px; margin: 0 auto; padding: 16px clamp(16px, 4vw, 40px) 40px; border-top: 1px solid var(--rule); font-size: 13px; color: var(--muted); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

@media (max-width: 900px) {
  .aim .layout { grid-template-columns: minmax(0,1fr); gap: 8px; }
  .aim nav.toc { position: static; border: 1px solid var(--rule); border-radius: 6px; padding: 14px; background: var(--surface); margin-bottom: 28px; }
  .aim nav.toc ol { grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); }
  .aim section.level1 > h1 { font-size: 28px; }
  .aim .cover { grid-template-columns: minmax(0,1fr); }
  .aim .cover-logo { order: -1; }
  .aim .cover-logo img { width: 110px; }
}

/* mobile menu (Alpine toggles .is-open) */
@media (max-width: 860px) {
  .aim .menutoggle { display: inline-flex; }
  .aim .topnav { display: none; order: 3; flex-basis: 100%; }
  .aim .topnav.is-open { display: block; }
  .aim .topnav ul { flex-direction: column; flex-wrap: nowrap; gap: 2px; padding: 6px 0 4px; }
  .aim .topnav a { padding: 12px 10px; }
  .aim .topnav .sub { display: flex; position: static; min-width: 0; margin: 2px 0 4px 12px; padding: 0 0 0 8px; border: 0; border-left: 2px solid var(--rule); border-radius: 0; box-shadow: none; background: transparent; }
}
@media (max-width: 420px) {
  .aim .topbar-in { gap: 8px; }
  .aim .brand { font-size: 17px; gap: 8px; }
  .aim .brand img { height: 30px; }
  .aim .tools { gap: 4px; }
  .aim .iconbtn { width: 36px; height: 36px; }
  .aim .langswitch a, .aim .langswitch .on, .aim .langswitch .off { padding: 9px 4px; }
  .aim .cover { padding-top: 32px; }
  .aim .cover h1 { font-size: 36px; }
  .aim .jit-cards, .aim .jit-features { grid-template-columns: minmax(0, 1fr); }
}

.aim .bizinfo { flex-basis: 100%; display: flex; flex-wrap: wrap; gap: 6px 28px; margin: 4px 0 0; padding-top: 12px; border-top: 1px dashed var(--rule); }
.aim .bizinfo div { display: flex; gap: 8px; }
.aim .bizinfo dt { font: 600 11px/1.9 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
.aim .bizinfo dd { margin: 0; font-variant-numeric: tabular-nums; }

/* balloons: cover logo rises and floats; a large green one drifts up behind the page */
.aim .cover-logo img { animation: aim-rise 6s ease-out both, aim-float 9s ease-in-out 6s infinite; }
@keyframes aim-rise { from { transform: translateY(120px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes aim-float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-18px); } }
.aim .bigballoon { position: fixed; z-index: -1; right: 6vw; bottom: 0; width: clamp(220px, 30vw, 420px); pointer-events: none; opacity: .16; animation: aim-ascend 80s linear infinite; }
.aim .bigballoon svg { display: block; width: 100%; height: auto; }
@keyframes aim-ascend { 0% { transform: translate(0, 110%); } 50% { transform: translate(-4vw, -45vh); } 100% { transform: translate(2vw, -115vh); } }
:root[data-theme="dark"] .aim .bigballoon { opacity: .12; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .aim .bigballoon { opacity: .12; } }
@media (prefers-reduced-motion: reduce) { .aim .cover-logo img, .aim .bigballoon { animation: none; } .aim .bigballoon { bottom: 10vh; } .aim .jit-card { transition: none; } .aim .jit-card:hover { transform: none; } }

@media print { .aim nav.toc, .aim .topbar, .aim .bigballoon, .aim .skip-link { display: none; } .aim .layout { display: block; } }