/* PocketAlign shared shell — tokens, layout and controls for the tool pages.
   The download page (index.html) keeps its own inline styles; these are the same tokens. */

:root {
  color-scheme: light dark;
  --ground: #EDF1F2; --panel: #FFFFFF; --panel-2: #F4F7F8; --ink: #11171A;
  --dim: #5A666C; --faint: #8A959B; --line: #D6DDE0; --accent: #178A4C;
  --accent-ink: #FFFFFF; --accent-soft: rgba(23,138,76,.12); --amber: #C9791F; --amber-soft: rgba(201,121,31,.09);
  --red: #B3261E; --red-soft: rgba(179,38,30,.08);
  --shadow: 0 1px 2px rgba(16,23,26,.06), 0 8px 30px rgba(16,23,26,.08);
  --mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ground: #0E1113; --panel: #161B1E; --panel-2: #1B2124; --ink: #E8EDEF;
    --dim: #96A1A7; --faint: #6C777D; --line: #262D31; --accent: #5FD08A;
    --accent-ink: #06210F; --accent-soft: rgba(95,208,138,.12); --amber: #E0A04A; --amber-soft: rgba(224,160,74,.11);
    --red: #F2837C; --red-soft: rgba(242,131,124,.10);
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 10px 40px rgba(0,0,0,.45);
  }
}
:root[data-theme="light"] {
  --ground: #EDF1F2; --panel: #FFFFFF; --panel-2: #F4F7F8; --ink: #11171A;
  --dim: #5A666C; --faint: #8A959B; --line: #D6DDE0; --accent: #178A4C;
  --accent-ink: #FFFFFF; --accent-soft: rgba(23,138,76,.12); --amber: #C9791F; --amber-soft: rgba(201,121,31,.09);
  --red: #B3261E; --red-soft: rgba(179,38,30,.08);
  --shadow: 0 1px 2px rgba(16,23,26,.06), 0 8px 30px rgba(16,23,26,.08);
}
:root[data-theme="dark"] {
  --ground: #0E1113; --panel: #161B1E; --panel-2: #1B2124; --ink: #E8EDEF;
  --dim: #96A1A7; --faint: #6C777D; --line: #262D31; --accent: #5FD08A;
  --accent-ink: #06210F; --accent-soft: rgba(95,208,138,.12); --amber: #E0A04A; --amber-soft: rgba(224,160,74,.11);
  --red: #F2837C; --red-soft: rgba(242,131,124,.10);
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 10px 40px rgba(0,0,0,.45);
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--ground); color: var(--ink); font-family: var(--sans); line-height: 1.55; -webkit-font-smoothing: antialiased; }
.wrap { max-width: 940px; margin: 0 auto; padding: 28px 20px 64px; }

/* Masthead ---------------------------------------------------------------- */
header.mast { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 6px 2px 22px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: inherit; }
.brand .glyph { width: 30px; height: 30px; border-radius: 8px; flex: none; border: 1px solid var(--line); background: var(--panel); display: grid; place-items: center; }
.brand .glyph::after { content: ""; width: 9px; height: 9px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.brand b { font-size: 1.02rem; letter-spacing: -.01em; }
.brand .by { color: var(--faint); font-size: .78rem; }
nav.crumbs { display: flex; gap: 14px; flex-wrap: wrap; font-size: .84rem; }
nav.crumbs a { color: var(--dim); text-decoration: none; }
nav.crumbs a:hover { color: var(--accent); }
nav.crumbs a[aria-current="page"] { color: var(--ink); font-weight: 600; }

/* Page head --------------------------------------------------------------- */
.eyebrow { font-family: var(--mono); font-size: .74rem; letter-spacing: .16em; text-transform: uppercase; color: var(--accent); margin: 0 0 10px; }
h1 { margin: 0 0 12px; font-size: clamp(1.7rem, 4.6vw, 2.4rem); line-height: 1.08; letter-spacing: -.022em; text-wrap: balance; font-weight: 800; }
.blurb { margin: 0 0 4px; color: var(--dim); font-size: 1rem; max-width: 60ch; text-wrap: pretty; }

section { margin-top: 34px; }
.sec-title { font-family: var(--mono); font-size: .74rem; letter-spacing: .16em; text-transform: uppercase; color: var(--dim); margin: 0 0 16px; display: flex; align-items: center; gap: 12px; }
.sec-title::after { content: ""; flex: 1; height: 1px; background: var(--line); }
h3 { margin: 0 0 6px; font-size: 1rem; letter-spacing: -.01em; }

/* Panels ------------------------------------------------------------------ */
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 20px; box-shadow: var(--shadow); }
.panel + .panel { margin-top: 14px; }
.panel > h2 { margin: 0 0 4px; font-size: 1.06rem; letter-spacing: -.015em; }
.panel > .sub { margin: 0 0 16px; color: var(--dim); font-size: .88rem; }

/* Cards / links ----------------------------------------------------------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
a.card { display: block; background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 18px; text-decoration: none; color: inherit; transition: transform .12s ease, border-color .12s ease, box-shadow .12s ease; }
a.card:hover { transform: translateY(-2px); border-color: var(--accent); box-shadow: var(--shadow); }
a.card .k { font-family: var(--mono); font-size: .68rem; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); margin: 0 0 8px; }
a.card p { margin: 0; color: var(--dim); font-size: .89rem; }

/* Form controls ----------------------------------------------------------- */
.fields { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.fields.two { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }
.field { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.field label { font-size: .78rem; color: var(--dim); letter-spacing: .01em; }
.field input, .field select {
  font: 500 1rem/1.2 var(--mono); color: var(--ink); background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 9px; padding: 11px 12px; width: 100%;
  -moz-appearance: textfield;
}
.field input:focus, .field select:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.field input::-webkit-outer-spin-button, .field input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.field .hint { font-size: .74rem; color: var(--faint); }

/* Segmented control: plain buttons toggled by script, so no :has() dependency. */
.seg { display: flex; gap: 8px; flex-wrap: wrap; }
.seg button {
  font: 500 .86rem/1 var(--sans); border: 1px solid var(--line); border-radius: 999px;
  padding: 10px 15px; cursor: pointer; color: var(--dim); background: var(--panel-2);
}
.seg button:hover { border-color: var(--accent); }
.seg button[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 9px; font: 600 .95rem/1 var(--sans); text-decoration: none; padding: 13px 20px; border-radius: 11px; border: 1px solid var(--line); background: var(--panel-2); color: var(--ink); cursor: pointer; }
.btn:hover { border-color: var(--accent); }
.btn-primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.btn-primary:hover { filter: brightness(1.05); }

/* Readouts ---------------------------------------------------------------- */
.out { margin-top: 18px; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--panel-2); }
.out .line { display: flex; align-items: baseline; justify-content: space-between; gap: 14px; padding: 11px 15px; border-bottom: 1px solid var(--line); }
.out .line:last-child { border-bottom: none; }
.out .line .k { color: var(--dim); font-size: .86rem; }
.out .line .v { font-family: var(--mono); font-size: 1rem; font-variant-numeric: tabular-nums; text-align: right; }
.out .line.hero .v { font-size: 1.34rem; font-weight: 600; }
.out .v.good { color: var(--accent); }
.out .v.warn { color: var(--amber); }
.out .v.bad { color: var(--red); }

.tablewrap { margin-top: 18px; overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; }
table { border-collapse: collapse; width: 100%; min-width: 420px; background: var(--panel-2); }
th, td { text-align: right; padding: 10px 14px; font-family: var(--mono); font-size: .88rem; font-variant-numeric: tabular-nums; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--faint); font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; font-weight: 500; }
th:first-child, td:first-child { text-align: left; }
tbody tr:last-child td { border-bottom: none; }
td.pos { color: var(--accent); }
td.neg { color: var(--amber); }

/* Notes ------------------------------------------------------------------- */
.note { margin-top: 16px; display: flex; gap: 11px; align-items: flex-start; background: var(--panel-2); border: 1px solid var(--line); border-left: 3px solid var(--amber); border-radius: 10px; padding: 13px 15px; color: var(--dim); font-size: .86rem; }
.note.stop { border-left-color: var(--red); background: var(--red-soft); }
.note.ok { border-left-color: var(--accent); }
.note b { color: var(--ink); }
.note p { margin: 0 0 6px; }
.note p:last-child { margin-bottom: 0; }

.banner { display: flex; gap: 12px; align-items: flex-start; margin: 0 0 22px; padding: 14px 17px; border: 1px solid var(--amber); border-left-width: 4px; border-radius: 12px; background: var(--amber-soft); color: var(--ink); font-size: .9rem; }
.banner svg { width: 19px; height: 19px; flex: none; color: var(--amber); margin-top: 1px; }
.banner span { color: var(--dim); }

/* Steps ------------------------------------------------------------------- */
ol.steps { list-style: none; counter-reset: step; margin: 0; padding: 0; }
ol.steps > li { counter-increment: step; position: relative; padding: 0 0 22px 52px; }
ol.steps > li::before {
  content: counter(step); position: absolute; left: 0; top: 0;
  width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center;
  font-family: var(--mono); font-size: .9rem; font-weight: 600;
  color: var(--accent-ink); background: var(--accent);
}
ol.steps > li::after { content: ""; position: absolute; left: 17px; top: 40px; bottom: 4px; width: 1px; background: var(--line); }
ol.steps > li:last-child { padding-bottom: 0; }
ol.steps > li:last-child::after { display: none; }
ol.steps h3 { margin: 6px 0 4px; }
ol.steps p { margin: 0; color: var(--dim); font-size: .92rem; }

ul.plain { margin: 0; padding-left: 20px; color: var(--dim); font-size: .92rem; }
ul.plain li { margin-bottom: 7px; }
ul.plain b { color: var(--ink); }

/* Diagrams ---------------------------------------------------------------- */
.diagram { display: block; width: 100%; max-width: 420px; margin: 4px auto 0; height: auto; }
.diagram .body { fill: var(--panel-2); stroke: var(--line); stroke-width: 2; }
.diagram .tire { fill: var(--dim); }
.diagram .corner-w { font-family: var(--mono); font-size: 13px; font-weight: 600; fill: var(--ink); }
.diagram .corner-k { font-family: var(--mono); font-size: 9px; letter-spacing: .1em; fill: var(--faint); }
.diagram .corner-p { font-family: var(--mono); font-size: 9px; fill: var(--dim); }
.diagram .centre { font-family: var(--mono); font-size: 12px; font-weight: 600; fill: var(--accent); text-anchor: middle; }
.diagram .axis { font-family: var(--mono); font-size: 9px; letter-spacing: .14em; fill: var(--faint); text-anchor: middle; }

/* Footer ------------------------------------------------------------------ */
footer { margin-top: 46px; padding-top: 22px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 8px 18px; align-items: center; justify-content: space-between; color: var(--faint); font-size: .82rem; }
footer a { color: var(--dim); text-decoration: none; }
footer a:hover { color: var(--accent); }

a:focus-visible, .btn:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 8px; }
@media (max-width: 560px) { .wrap { padding: 22px 16px 52px; } .panel { padding: 16px; } }