/* albertomartin.digital — educational publication
   One stylesheet. Mobile-first. No frameworks. */

:root {
  --paper:      #f5f4ef;
  --paper-alt:  #ebe9e1;
  --card:       #fffefb;
  --ink:        #1b2320;
  --muted:      #5b635e;
  --accent:     #1f4d3d;
  --accent-ink: #16382b;
  --rule:       #d9d7cd;
  --warn-bg:    #f2efe4;

  --measure: 34rem;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --s1: .5rem;
  --s2: 1rem;
  --s3: 1.5rem;
  --s4: 2.25rem;
  --s5: 3.5rem;
  --s6: 5rem;
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; }

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: .18em;
  text-decoration-thickness: .06em;
}
a:hover { color: var(--accent-ink); }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: .75rem 1rem;
  z-index: 50;
}
.skip:focus { left: 0; }

/* ---------- layout ---------- */

.wrap {
  width: 100%;
  max-width: 62rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.prose { max-width: var(--measure); }

.band { padding: var(--s5) 0; border-top: 1px solid var(--rule); }
.band-tint { background: var(--paper-alt); }
.band-first { border-top: 0; }

/* ---------- header ---------- */

.masthead {
  background: var(--paper);
  border-bottom: 2px solid var(--ink);
}

.masthead-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .75rem 1rem;
  padding-top: 1.1rem;
  padding-bottom: .9rem;
}

.wordmark {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: .005em;
  color: var(--ink);
  text-decoration: none;
}
.wordmark:hover { color: var(--ink); text-decoration: underline; }

.badge {
  font-family: var(--sans);
  font-size: .72rem;
  line-height: 1;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 2px;
  padding: .35rem .5rem;
  white-space: nowrap;
}

.nav-toggle {
  margin-left: auto;
  font-family: var(--sans);
  font-size: .9rem;
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: .45rem .7rem;
  color: var(--ink);
  cursor: pointer;
}

.nav {
  width: 100%;
  border-top: 1px solid var(--rule);
  padding: .35rem 0 .6rem;
}
.nav[hidden] { display: none; }

.nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: .1rem;
}

.nav a {
  display: block;
  font-family: var(--sans);
  font-size: .95rem;
  text-decoration: none;
  color: var(--ink);
  padding: .5rem .1rem;
}
.nav a:hover { text-decoration: underline; }
.nav a[aria-current="page"] {
  color: var(--accent);
  font-weight: 600;
  box-shadow: inset 3px 0 0 var(--accent);
  padding-left: .7rem;
}

@media (min-width: 46rem) {
  .nav-toggle { display: none; }
  .nav { width: auto; margin-left: auto; border-top: 0; padding: 0; }
  .nav[hidden] { display: block; }
  .nav ul { flex-direction: row; gap: 1.4rem; }
  .nav a { padding: .1rem 0; }
  .nav a[aria-current="page"] {
    box-shadow: inset 0 -2px 0 var(--accent);
    padding-left: 0;
  }
}

/* ---------- type ---------- */

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -.012em;
  margin: 0 0 var(--s2);
  text-wrap: balance;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.4rem; margin-top: var(--s4); }
h3 { font-size: 1.1rem; margin-top: var(--s3); margin-bottom: .4rem; }

@media (min-width: 46rem) {
  h1 { font-size: 2.6rem; }
  h2 { font-size: 1.65rem; }
}

p { margin: 0 0 1.05rem; }
.lede { font-size: 1.2rem; line-height: 1.5; color: var(--ink); }
.small { font-size: .93rem; color: var(--muted); }

.kicker {
  font-family: var(--sans);
  font-size: .85rem;
  color: var(--muted);
  margin: 0 0 .6rem;
}

.byline {
  font-family: var(--sans);
  font-size: .88rem;
  color: var(--muted);
  border-top: 1px solid var(--rule);
  padding-top: .8rem;
  margin-top: var(--s3);
}

ul.plain, ol.plain { padding-left: 1.15rem; margin: 0 0 1.1rem; }
ul.plain li, ol.plain li { margin-bottom: .5rem; }

/* ---------- hero ---------- */

.hero { padding: var(--s4) 0 var(--s5); }

.hero-grid { display: grid; gap: var(--s4); }

@media (min-width: 56rem) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: var(--s5);
    align-items: start;
  }
}

/* the form-sheet motif: ruled fields, like a paper return */
.sheet {
  background: var(--card);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--accent);
  padding: 1.4rem 1.35rem 1.1rem;
}

.sheet h2 {
  margin: 0 0 1rem;
  font-size: 1.05rem;
  letter-spacing: 0;
}

.field {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  padding: .55rem 0;
  border-bottom: 1px solid var(--rule);
}
.field:last-of-type { border-bottom: 0; }

.field-no {
  font-family: var(--sans);
  font-size: .78rem;
  color: var(--accent);
  min-width: 2.2rem;
}
.field-name { font-size: .98rem; }
.field-note {
  display: block;
  font-family: var(--sans);
  font-size: .82rem;
  color: var(--muted);
  margin-top: .15rem;
}

/* ---------- buttons ---------- */

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin: var(--s3) 0 0;
}

.btn {
  display: inline-block;
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.2;
  padding: .8rem 1.15rem;
  border-radius: 2px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { background: var(--accent-ink); color: #fff; }

.btn-quiet {
  background: transparent;
  color: var(--accent);
}
.btn-quiet:hover { background: rgba(31, 77, 61, .07); color: var(--accent-ink); }

/* ---------- two-list contrast ---------- */

.cols { display: grid; gap: var(--s3); }
@media (min-width: 46rem) {
  .cols-2 { grid-template-columns: 1fr 1fr; gap: var(--s4); }
}

.marklist { list-style: none; margin: 0; padding: 0; }
.marklist li {
  position: relative;
  padding-left: 1.6rem;
  margin-bottom: .65rem;
}
.marklist li::before {
  position: absolute;
  left: 0;
  top: .05rem;
  font-family: var(--sans);
  font-size: .95rem;
}
.marklist-in li::before { content: "\002713"; color: var(--accent); }
.marklist-out li::before { content: "\002715"; color: #8a5b4a; }
.marklist-out li { color: var(--muted); }

/* ---------- notice ---------- */

.notice {
  background: var(--warn-bg);
  border-left: 4px solid var(--accent);
  padding: 1.1rem 1.2rem;
  margin: var(--s3) 0;
}
.notice :last-child { margin-bottom: 0; }
.notice h2, .notice h3 { margin-top: 0; }

/* ---------- guide article ---------- */

.article { padding: var(--s4) 0 var(--s5); }

.article-grid { display: grid; gap: var(--s4); }

@media (min-width: 60rem) {
  .article-grid {
    grid-template-columns: 14rem minmax(0, 1fr);
    gap: var(--s5);
    align-items: start;
  }
  .toc {
    position: sticky;
    top: 1.5rem;
    order: -1;
  }
}

.toc {
  border-top: 2px solid var(--ink);
  padding-top: .8rem;
  font-family: var(--sans);
  font-size: .9rem;
}
.toc p { font-weight: 600; margin-bottom: .5rem; }
.toc ol { list-style: decimal; padding-left: 1.2rem; margin: 0; color: var(--muted); }
.toc li { margin-bottom: .35rem; }
.toc a { text-decoration: none; }
.toc a:hover { text-decoration: underline; }

.article-body h2 {
  padding-top: var(--s2);
  border-top: 1px solid var(--rule);
}

.article-body h2:first-of-type { border-top: 0; padding-top: 0; }

.meta-line {
  font-family: var(--sans);
  font-size: .85rem;
  color: var(--muted);
  margin-bottom: var(--s3);
}

/* ---------- definition list / glossary ---------- */

dl.terms { margin: 0 0 var(--s3); }
dl.terms dt { font-weight: 600; margin-top: 1rem; }
dl.terms dd { margin: .2rem 0 0; color: var(--muted); }

/* ---------- forms ---------- */

.form {
  background: var(--card);
  border: 1px solid var(--rule);
  padding: 1.4rem 1.3rem;
  max-width: 30rem;
}

.form-row { margin-bottom: 1.1rem; }

.form label {
  display: block;
  font-family: var(--sans);
  font-size: .9rem;
  margin-bottom: .3rem;
}

.form input[type="text"],
.form input[type="email"],
.form textarea {
  width: 100%;
  font-family: var(--sans);
  font-size: 1rem;
  color: var(--ink);
  background: #fff;
  border: 1px solid #b9b5a8;
  border-radius: 2px;
  padding: .6rem .65rem;
}

.form textarea { min-height: 9rem; resize: vertical; }

.check {
  display: flex;
  gap: .6rem;
  align-items: flex-start;
  font-family: var(--sans);
  font-size: .9rem;
  line-height: 1.45;
}
.check input { margin-top: .2rem; width: 1.05rem; height: 1.05rem; flex: none; }

.form-note {
  font-family: var(--sans);
  font-size: .82rem;
  color: var(--muted);
  margin: .9rem 0 0;
}

.thanks {
  background: var(--card);
  border: 1px solid var(--accent);
  border-left: 4px solid var(--accent);
  padding: 1.3rem;
  max-width: 30rem;
}
.thanks h2 { margin-top: 0; font-size: 1.2rem; }
.thanks :last-child { margin-bottom: 0; }

[hidden] { display: none !important; }

/* ---------- footer ---------- */

.footer {
  border-top: 2px solid var(--ink);
  background: var(--paper-alt);
  padding: var(--s4) 0 var(--s5);
  font-family: var(--sans);
  font-size: .9rem;
  color: var(--muted);
}

.footer-grid { display: grid; gap: var(--s3); }
@media (min-width: 46rem) {
  .footer-grid { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: var(--s4); }
}

.footer p { margin: 0 0 .55rem; }
.footer strong { color: var(--ink); font-weight: 600; }

.footer ul { list-style: none; margin: 0; padding: 0; }
.footer li { margin-bottom: .4rem; }

.footer-legal {
  border-top: 1px solid var(--rule);
  margin-top: var(--s3);
  padding-top: var(--s2);
  color: var(--ink);
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* ---------- honesty notice (inactive backend) ---------- */

.alertbox {
  background: #f4ece4;
  border-left: 4px solid #8a5b4a;
  padding: 1rem 1.15rem;
  margin: 0 0 var(--s3);
  font-family: var(--sans);
  font-size: .92rem;
  line-height: 1.5;
}
.alertbox p { margin: 0 0 .5rem; }
.alertbox :last-child { margin-bottom: 0; }
.alertbox strong { color: #6f4436; }

.form-inactive { opacity: 1; }
.form-inactive legend,
.form-inactive .form-title {
  font-family: var(--sans);
  font-size: .95rem;
  font-weight: 600;
  padding: 0;
  margin: 0 0 .9rem;
}

.quiet-line {
  font-family: var(--sans);
  font-size: .92rem;
  color: var(--muted);
  margin: .9rem 0 0;
}

/* ---------- printable checklist document ---------- */

.doc {
  background: var(--card);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--accent);
  padding: 1.6rem 1.4rem;
}

@media (min-width: 46rem) {
  .doc { padding: 2.25rem 2.5rem; }
}

.doc h2:first-child { margin-top: 0; }

.doc-head {
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1rem;
  margin-bottom: 1.4rem;
}
.doc-head p { margin-bottom: .3rem; }

.doc-meta {
  font-family: var(--sans);
  font-size: .85rem;
  color: var(--muted);
  margin: 0;
}

ol.boxes { list-style: none; margin: 0 0 1.4rem; padding: 0; counter-reset: box; }

ol.boxes li {
  position: relative;
  padding-left: 2.9rem;
  margin-bottom: 1.05rem;
  counter-increment: box;
}

ol.boxes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .32em;
  width: .95rem;
  height: .95rem;
  border: 1.5px solid var(--accent);
  border-radius: 1px;
}

ol.boxes li::after {
  content: counter(box) ".";
  position: absolute;
  left: 1.45rem;
  top: 0;
  font-family: var(--sans);
  font-size: .85rem;
  color: var(--accent);
}

ol.boxes .box-note {
  display: block;
  font-size: .92rem;
  color: var(--muted);
  margin-top: .2rem;
}

.doc dl.terms dt { font-size: .98rem; }

.print-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  align-items: center;
  margin-top: var(--s3);
}

/* ---------- 404 ---------- */

.lost { padding: var(--s5) 0 var(--s6); }
.lost h1 { margin-bottom: .6rem; }

/* ---------- print ---------- */

@media print {
  .no-print, .masthead, .footer, .skip, .nav, .nav-toggle, .print-actions { display: none !important; }

  html, body {
    background: #fff;
    color: #000;
    font-size: 11pt;
  }

  .wrap { max-width: none; padding: 0; }

  .doc {
    border: 0;
    padding: 0;
    background: #fff;
  }

  .doc-head { border-bottom: 1pt solid #000; }

  ol.boxes li::before { border: 1pt solid #000; }
  ol.boxes li::after, .doc-head .doc-meta, ol.boxes .box-note { color: #000; }

  .notice, .alertbox {
    border: 1pt solid #000;
    border-left: 3pt solid #000;
    background: #fff;
    padding: .5rem .7rem;
  }

  a { color: #000; text-decoration: underline; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 9pt; }
  a[href^="#"]::after, a[href^="mailto"]::after { content: ""; }

  h2, h3 { page-break-after: avoid; }
  ol.boxes li { page-break-inside: avoid; }
}