/*
  Solo Tool Stack — editorial "field notes" design system.
  Plain CSS, no build step, no external font/icon requests.
*/

:root {
  --paper: #f6f2e9;
  --paper-alt: #efe9da;
  --card: #fffdf8;
  --ink: #1d1a15;
  --ink-soft: #4b463b;
  --ink-faint: #766f5f;
  --line: #ddd3bd;
  --line-strong: #c7b998;
  --accent: #a8391c;
  --accent-dark: #82290f;
  --accent-2: #26543a;
  --accent-2-soft: #e4ede6;
  --accent-soft: #f3e2da;
  --focus: #1c66c9;
  --radius: 3px;
  --max: 1180px;
  --serif: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  color-scheme: light;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--accent-dark);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 2px;
}

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

a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--ink);
  color: #fff;
  padding: 0.75em 1.25em;
  z-index: 1000;
  border-radius: var(--radius);
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
  margin: 0 0 0.5em;
}

h1 { font-size: clamp(2rem, 4.2vw, 3.1rem); }
h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); margin-top: 2.2em; }
h3 { font-size: 1.25rem; margin-top: 1.6em; }
h4 { font-size: 1.05rem; }

p { margin: 0 0 1.1em; }

ul, ol { padding-left: 1.4em; }
li { margin-bottom: 0.4em; }

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.prose {
  max-width: 74ch;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-dark);
  font-weight: 600;
}

.eyebrow::before {
  content: "";
  width: 1.4em;
  height: 1.5px;
  background: var(--accent);
  display: inline-block;
}

/* ---------- Header ---------- */

.site-header {
  border-bottom: 1px solid var(--line-strong);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65em;
  text-decoration: none;
  color: var(--ink);
}

.brand:hover {
  color: var(--ink);
}

.brand-mark {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}

.brand-name small {
  display: block;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 500;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1.5px solid var(--ink);
  border-radius: var(--radius);
  padding: 0.4em 0.6em;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--ink);
  cursor: pointer;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.3em 0.1em;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.9rem;
    padding: 1rem 0 1.4rem;
    border-top: 1px solid var(--line);
    margin-top: 0.8rem;
  }
  .site-nav.is-open { display: flex; }
  .site-header .container { flex-wrap: wrap; }
}

/* ---------- Disclosure banner ---------- */

.disclosure-banner {
  background: var(--accent-soft);
  border-bottom: 1px solid var(--line-strong);
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.disclosure-banner .container {
  padding-top: 0.55rem;
  padding-bottom: 0.55rem;
}

.disclosure-banner a {
  color: var(--accent-dark);
  font-weight: 600;
}

/* ---------- Breadcrumbs ---------- */

.breadcrumbs {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-faint);
  margin: 1.4rem 0 0.4rem;
}

.breadcrumbs a {
  color: var(--ink-faint);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
}

.breadcrumbs .sep {
  margin: 0 0.4em;
  opacity: 0.6;
}

/* ---------- Hero ---------- */

.hero {
  padding: 3.4rem 0 3rem;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(180deg, var(--paper-alt), var(--paper) 70%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: start;
}

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
}

.hero h1 {
  margin-top: 0.4em;
}

.hero-lede {
  font-size: 1.18rem;
  color: var(--ink-soft);
  max-width: 56ch;
}

.hero-actions {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
  margin-top: 1.4rem;
}

.hero-card {
  background: var(--card);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem;
}

.hero-card h2 {
  font-size: 1rem;
  margin: 0 0 0.7em;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-family: var(--mono);
  font-weight: 700;
}

.hero-card ol {
  margin: 0;
  padding-left: 1.2em;
}

.hero-card li {
  margin-bottom: 0.7em;
  font-size: 0.95rem;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.65em 1.2em;
  border-radius: var(--radius);
  text-decoration: none;
  border: 1.5px solid var(--ink);
  cursor: pointer;
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
}

.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--ink);
}

.btn-outline:hover {
  background: var(--ink);
  color: var(--paper);
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  background: var(--accent);
  color: #fff !important;
  font-weight: 700;
  padding: 0.6em 1.1em;
  border-radius: var(--radius);
  text-decoration: none;
  font-size: 0.92rem;
  border: 1.5px solid var(--accent-dark);
}

.cta-button:hover {
  background: var(--accent-dark);
}

.placeholder-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  padding: 0.15em 0.5em;
  margin-top: 0.4em;
}

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

.section {
  padding: 3.2rem 0;
}

.section-tight {
  padding: 2rem 0;
}

.section-alt {
  background: var(--paper-alt);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1.5rem;
  margin-bottom: 1.8rem;
  flex-wrap: wrap;
}

.section-head p {
  margin: 0.4em 0 0;
  color: var(--ink-soft);
  max-width: 60ch;
}

/* ---------- Cards / grids ---------- */

.grid {
  display: grid;
  gap: 1.4rem;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

.card {
  background: var(--card);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card .index {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent-dark);
  letter-spacing: 0.08em;
  margin-bottom: 0.6em;
}

.card h3 {
  margin-top: 0;
  font-size: 1.15rem;
}

.card p {
  color: var(--ink-soft);
  font-size: 0.95rem;
  flex-grow: 1;
}

.card a.card-link {
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--accent-dark);
}

/* ---------- Tool cards (category / guide listings) ---------- */

.tool-card {
  background: var(--card);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 1.6rem;
  margin-bottom: 1.4rem;
}

.tool-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.9rem;
  margin-bottom: 0.9rem;
}

.tool-card-head h3 {
  margin: 0;
}

.rank-badge {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  background: var(--accent-2-soft);
  color: var(--accent-2);
  border: 1px solid var(--accent-2);
  border-radius: 999px;
  padding: 0.25em 0.8em;
  white-space: nowrap;
}

.best-for {
  font-size: 0.85rem;
  color: var(--ink-faint);
  font-style: italic;
}

.pros-cons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin: 1rem 0;
}

@media (max-width: 640px) {
  .pros-cons { grid-template-columns: 1fr; }
}

.pros-cons h4 {
  margin: 0 0 0.4em;
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.pros h4 { color: var(--accent-2); }
.cons h4 { color: var(--accent-dark); }

.pros-cons ul {
  margin: 0;
  padding-left: 1.1em;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.tool-card-foot {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

/* ---------- Callouts ---------- */

.callout {
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  padding: 1.1rem 1.3rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.6em 0;
}

.callout.verdict {
  border-left-color: var(--accent-2);
  background: var(--accent-2-soft);
}

.callout h4 {
  margin-top: 0;
  font-family: var(--mono);
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}

.callout p:last-child {
  margin-bottom: 0;
}

/* ---------- Tables ---------- */

.table-wrap {
  overflow-x: auto;
  margin: 1.6em 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.92rem;
  background: var(--card);
}

th, td {
  text-align: left;
  padding: 0.7em 0.9em;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

thead th {
  background: var(--paper-alt);
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
  border-bottom: 2px solid var(--line-strong);
}

tbody tr:last-child td {
  border-bottom: none;
}

/* ---------- FAQ ---------- */

.faq details {
  border-bottom: 1px solid var(--line);
  padding: 0.9em 0;
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
  font-family: var(--serif);
  font-size: 1.05rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1em;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: "+";
  font-family: var(--mono);
  color: var(--accent);
  flex-shrink: 0;
}

.faq details[open] summary::after {
  content: "\2212";
}

.faq .faq-answer {
  margin-top: 0.6em;
  color: var(--ink-soft);
}

/* ---------- Category grid on categories index ---------- */

.category-card {
  border: 1px solid var(--line-strong);
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.6rem;
  text-decoration: none;
  color: var(--ink);
  display: block;
  height: 100%;
}

.category-card:hover {
  border-color: var(--accent);
  color: var(--ink);
}

.category-card .index {
  font-family: var(--mono);
  color: var(--accent-dark);
  font-size: 0.78rem;
}

.category-card h3 {
  margin: 0.3em 0 0.4em;
}

.category-card p {
  color: var(--ink-soft);
  font-size: 0.92rem;
  margin: 0;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line-strong);
  background: var(--paper-alt);
  padding: 2.6rem 0 1.6rem;
  margin-top: 3rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-grid h4 {
  font-family: var(--mono);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  margin-bottom: 0.8em;
}

.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-grid a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.92rem;
}

.footer-grid a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
}

.footer-about {
  font-size: 0.92rem;
  color: var(--ink-soft);
  max-width: 42ch;
}

.footer-bottom {
  border-top: 1px solid var(--line);
  margin-top: 2.2rem;
  padding-top: 1.2rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.8rem;
  font-size: 0.82rem;
  color: var(--ink-faint);
}

/* ---------- Misc utility ---------- */

.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.small { font-size: 0.88rem; color: var(--ink-faint); }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.divider {
  border: none;
  border-top: 1px solid var(--line);
  margin: 2.4rem 0;
}

.stat-row {
  display: flex;
  gap: 2.2rem;
  flex-wrap: wrap;
  margin: 1.6rem 0;
}

.stat {
  font-family: var(--mono);
}

.stat strong {
  display: block;
  font-family: var(--serif);
  font-size: 1.8rem;
  color: var(--accent-dark);
}

.stat span {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
}

.error-page {
  padding: 5rem 0;
  text-align: center;
}

.error-page .code {
  font-family: var(--mono);
  font-size: 5rem;
  color: var(--accent);
  line-height: 1;
}