/* CopyTidy — visual identity
   Warm paper background, ink text, teal accent. Calm productivity-tool feel
   for students, researchers, writers, and engineers. */

:root {
  --bg: #f6f5f1;
  --surface: #ffffff;
  --ink: #23272f;
  --muted: #646b76;
  --border: #e2e0d8;
  --border-strong: #cfccc0;
  --accent: #0f766e;
  --accent-hover: #0b5d56;
  --accent-soft: #e7f1ef;
  --highlight: #fdf3df;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(35, 39, 47, 0.05), 0 4px 12px rgba(35, 39, 47, 0.04);
  --max-width: 1020px;
  font-size: 16.5px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

main.container {
  flex: 1;
  padding-top: 2.5rem;
  padding-bottom: 4rem;
}

/* Header */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}

.brand {
  font-weight: 800;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
  font-size: 1.15rem;
}

.brand .brand-mark {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 1.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.95rem;
}

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

/* Footer */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.footer-links {
  display: flex;
  gap: 1.1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a {
  color: var(--muted);
}

/* Typography */
h1 {
  font-size: 2.15rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 0.9rem;
}

h2 {
  font-size: 1.45rem;
  letter-spacing: -0.01em;
  margin: 2.75rem 0 0.9rem;
}

h3 {
  font-size: 1.05rem;
  margin: 1.5rem 0 0.5rem;
}

p {
  margin: 0 0 1rem;
}

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

.lead {
  font-size: 1.12rem;
  color: var(--muted);
  max-width: 44rem;
}

/* Badge — small label above headings */
.badge {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  margin-bottom: 0.9rem;
}

/* Buttons */
.btn {
  display: inline-block;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--ink);
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

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

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

.btn-small {
  font-size: 0.85rem;
  padding: 0.35rem 0.75rem;
  font-weight: 500;
}

/* Steps strip (paste → choose → clean → copy) */
.steps {
  display: flex;
  gap: 0.5rem 1.75rem;
  flex-wrap: wrap;
  list-style: none;
  margin: 0 0 1.75rem;
  padding: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.steps li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.steps .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.8rem;
}

/* Tool layout */
.privacy-note {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 0.65rem 1rem;
  font-size: 0.95rem;
  margin: 1.25rem 0 1.75rem;
}

.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

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

.tool-pane {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.tool-pane label {
  font-weight: 700;
  font-size: 0.92rem;
}

.tool-pane textarea {
  width: 100%;
  min-height: 340px;
  resize: vertical;
  padding: 0.85rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.88rem;
  line-height: 1.55;
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.tool-pane textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

.options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.45rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.1rem 1.25rem;
  margin: 1.25rem 0;
}

.options label {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  font-size: 0.92rem;
  cursor: pointer;
}

.options input {
  margin-top: 0.3rem;
  accent-color: var(--accent);
}

.toolbar {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin: 1.25rem 0 1.75rem;
}

.status {
  font-size: 0.85rem;
  color: var(--muted);
  min-height: 1.2em;
}

/* Fix list (concrete transformations) */
.fix-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin: 1.25rem 0;
}

.fix-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem 1.1rem;
}

.fix-item h3 {
  margin: 0 0 0.4rem;
  font-size: 0.98rem;
}

.fix-item p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.fix-item code {
  background: var(--highlight);
  border-radius: 4px;
  padding: 0.05rem 0.3rem;
  font-size: 0.84em;
}

/* Before/after examples */
.example-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

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

.example-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.1rem 1.2rem;
  overflow-x: auto;
}

.example-box h3 {
  margin-top: 0;
}

.example-box pre {
  margin: 0;
  white-space: pre-wrap;
  font-size: 0.84rem;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
}

/* FAQ */
.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.8rem 1.1rem;
  margin-bottom: 0.65rem;
}

.faq summary {
  font-weight: 700;
  cursor: pointer;
}

.faq details p {
  margin: 0.65rem 0 0;
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem 1.6rem;
  margin: 1.25rem 0;
}

.card h2 {
  margin-top: 0;
}

/* Audience strip (home) */
.audience {
  display: flex;
  gap: 0.5rem 1.5rem;
  flex-wrap: wrap;
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.audience li::before {
  content: "✓ ";
  color: var(--accent);
  font-weight: 700;
}