/* FireCAD Calc public pages. Brand tokens from the programme roadmap §3; FireCad.Brand replaces this file when published. */
:root {
    --navy: #0c1a2c; --navy-2: #12284a; --orange: #f26522; --cta: #c24409; --ink: #14171f; --rule: #d9dfe5;
    --paper: #ffffff; --paper-2: #f5f7fa; --muted: #5b6573; --ok: #1e7f4f; --warn: #a2600a; --error: #b3261e;
    --font: 'Archivo', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
}
html { font-size: 16px; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--paper-2); line-height: 1.5; }
a { color: var(--navy-2); }
a:hover { color: var(--cta); }
h1 { font-size: 1.9rem; line-height: 1.2; margin: 0.4rem 0 0.6rem; color: var(--navy); }
h2 { font-size: 1.35rem; margin: 1.6rem 0 0.6rem; color: var(--navy); }
h3 { font-size: 1.05rem; margin: 1.2rem 0 0.4rem; color: var(--navy-2); }
.wrap { max-width: 1240px; margin: 0 auto; padding: 0 16px; }
.lead { color: var(--muted); font-size: 1.05rem; margin: 0 0 1.2rem; }
.small { color: var(--muted); font-size: 0.9rem; }
.count { display: inline-block; min-width: 1.4em; padding: 0 0.4em; border-radius: 1em; background: var(--rule); color: var(--navy); font-size: 0.75rem; text-align: center; vertical-align: middle; }

/* header */
.site-header { background: var(--navy); color: #fff; }
.header-row { display: flex; align-items: center; gap: 1rem; min-height: 56px; flex-wrap: wrap; padding-top: 6px; padding-bottom: 6px; }
.brand { color: #fff; text-decoration: none; font-weight: 700; font-size: 1.25rem; letter-spacing: 0.01em; }
.brand-sub { color: var(--orange); }
.search { display: flex; flex: 1 1 260px; max-width: 520px; }
.search input { flex: 1; border: 1px solid var(--rule); border-radius: 4px 0 0 4px; padding: 0.45rem 0.7rem; font: inherit; }
.search button { border: 0; border-radius: 0 4px 4px 0; background: var(--orange); color: #fff; padding: 0.45rem 0.9rem; font: inherit; font-weight: 600; cursor: pointer; }
.search.big { max-width: 100%; margin-bottom: 1rem; }
.header-links a { color: #fff; margin-left: 1rem; text-decoration: none; font-weight: 500; }
.header-links a:hover { color: var(--orange); }

/* layout */
.page-grid { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 2rem; padding-top: 1.2rem; padding-bottom: 2rem; }
.side-nav { font-size: 0.95rem; }
.side-nav .nav-group { margin-bottom: 1rem; }
.side-nav .nav-discipline { display: block; font-weight: 700; color: var(--navy); text-decoration: none; margin-bottom: 0.2rem; }
.side-nav ul { list-style: none; margin: 0; padding: 0 0 0 0.6rem; border-left: 2px solid var(--rule); }
.side-nav li a { display: block; padding: 0.15rem 0.4rem; color: var(--ink); text-decoration: none; border-radius: 3px; }
.side-nav li a:hover { background: #fff; color: var(--cta); }
.content { min-width: 0; }
.crumbs { font-size: 0.9rem; color: var(--muted); margin-top: 0.3rem; }
.crumbs a { color: var(--muted); }
@media (max-width: 900px) {
    .page-grid { grid-template-columns: 1fr; gap: 1rem; }
    .side-nav { order: 2; border-top: 1px solid var(--rule); padding-top: 1rem; }
    .content { order: 1; }
    .side-nav ul { border: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.3rem; }
    .side-nav li a { background: #fff; border: 1px solid var(--rule); }
}

/* cards */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 0.9rem; margin: 0.6rem 0 1.2rem; }
.card { display: block; background: var(--paper); border: 1px solid var(--rule); border-radius: 8px; padding: 0.9rem 1rem; text-decoration: none; color: inherit; transition: border-color 0.15s, transform 0.15s; }
.card:hover { border-color: var(--orange); transform: translateY(-2px); color: inherit; }
.card h3 { margin: 0 0 0.3rem; font-size: 1rem; color: var(--navy-2); }
.card p { margin: 0; font-size: 0.9rem; color: var(--muted); }

/* calculator */
.calc-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1.2rem; align-items: start; }
.panel { background: var(--paper); border: 1px solid var(--rule); border-radius: 8px; padding: 1rem 1.2rem 1.2rem; }
.panel h2 { margin-top: 0.2rem; font-size: 1.15rem; }
.calc-form .group { font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); margin: 1rem 0 0.3rem; }
.field { display: block; margin: 0 0 0.7rem; }
.field > label, .field > span { display: block; font-size: 0.9rem; font-weight: 500; margin-bottom: 0.2rem; }
.field small { display: block; color: var(--muted); font-size: 0.8rem; margin-top: 0.15rem; }
.field select, .field input { font: inherit; padding: 0.4rem 0.5rem; border: 1px solid var(--rule); border-radius: 4px; background: #fff; }
.field > select { width: 100%; }
.value-unit { display: grid; grid-template-columns: minmax(0, 1fr) minmax(110px, 38%); gap: 0.4rem; }
.value-unit input { min-width: 0; }
.presets { font-size: 0.9rem; margin: 0.4rem 0 0.8rem; }
.preset { display: inline-block; margin: 0.15rem 0.3rem 0.15rem 0; padding: 0.1rem 0.6rem; border: 1px solid var(--rule); border-radius: 1rem; text-decoration: none; color: var(--navy-2); background: var(--paper-2); }
.preset.on, .preset:hover { border-color: var(--orange); color: var(--cta); }
.cta, .button { display: inline-block; border: 0; border-radius: 4px; background: var(--cta); color: #fff; padding: 0.6rem 1.2rem; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; }
.cta { width: 100%; margin-top: 0.5rem; font-size: 1.05rem; }
.button:hover, .cta:hover { background: var(--orange); color: #fff; }
.button.secondary { background: var(--paper-2); color: var(--navy-2); border: 1px solid var(--rule); }
.actions { margin: 1rem 0 0.5rem; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.results-table { width: 100%; border-collapse: collapse; }
.results-table th { text-align: left; font-weight: 500; padding: 0.4rem 0.3rem; border-bottom: 1px solid var(--rule); font-size: 0.95rem; }
.results-table td { padding: 0.4rem 0.3rem; border-bottom: 1px solid var(--rule); white-space: nowrap; }
.results-table td.num { text-align: right; font-weight: 600; font-variant-numeric: tabular-nums; }
.results-table td.unit { color: var(--muted); width: 1%; }
.alert { padding: 0.5rem 0.7rem; border-radius: 4px; background: var(--paper-2); border-left: 4px solid var(--rule); margin: 0 0 0.6rem; font-size: 0.92rem; }
.alert.error { border-color: var(--error); color: var(--error); }
.alert.warn { border-color: var(--warn); }
.alert.ok { border-color: var(--ok); color: var(--ok); }
.save-form { display: flex; gap: 0.4rem; margin-top: 0.8rem; }
.save-form input[type=text] { flex: 1; font: inherit; padding: 0.4rem 0.5rem; border: 1px solid var(--rule); border-radius: 4px; }
.save-form button { border: 0; border-radius: 4px; background: var(--navy-2); color: #fff; padding: 0.4rem 0.9rem; font: inherit; cursor: pointer; }

/* article */
.article { background: var(--paper); border: 1px solid var(--rule); border-radius: 8px; padding: 1rem 1.4rem 1.4rem; margin-top: 1.6rem; overflow-x: auto; }
.article table { border-collapse: collapse; margin: 0.6rem 0 1rem; font-size: 0.95rem; }
.article th, .article td { border: 1px solid var(--rule); padding: 0.35rem 0.6rem; text-align: left; vertical-align: top; }
.article th { background: var(--paper-2); }
.article .math { overflow-x: auto; }
.faq { border: 1px solid var(--rule); border-radius: 6px; padding: 0.5rem 0.9rem; margin: 0.4rem 0; background: var(--paper); }
.faq summary { cursor: pointer; font-weight: 500; }
.faq div { color: var(--muted); padding-top: 0.3rem; }
.notice { max-width: 560px; margin: 3rem auto; background: var(--paper); border: 1px solid var(--rule); border-radius: 8px; padding: 1.5rem 2rem; text-align: center; }

/* footer */
.site-footer { border-top: 1px solid var(--rule); color: var(--muted); font-size: 0.9rem; padding: 1.2rem 0 2rem; background: var(--paper); }
.site-footer p { margin: 0.2rem 0; }