/* ==========================================================================
   ScholarSyncResearch — Design tokens
   Concept: the manuscript margin. An editor's markup — strike, caret,
   insertion — turning a rough draft into a finished page. Ink on paper,
   restrained, no photography needed.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:opsz,wght@8..60,400;8..60,500;8..60,600;8..60,700&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  /* Color */
  --ink:        #16233A;   /* primary text, dark sections */
  --ink-70:     #4A5568;   /* secondary text */
  --paper:      #F6F3EC;   /* page background — warm manuscript paper */
  --paper-dim:  #EDE8DB;   /* recessed panels */
  --rule:       #C9C2B4;   /* hairlines, dividers (decorative only — not for UI borders) */
  --rule-strong:#8C8371;   /* stronger boundary for interactive UI: 3.4:1 vs white, meets WCAG 1.4.11 */
  --green:      #29603F;   /* editorial approval mark — links, accents */
  --green-dim:  #E4ECE5;   /* green tint background */
  --red:        #A13A2D;   /* editorial correction mark — used sparingly */
  --white:      #FFFEFB;

  /* Type */
  --font-display: 'Source Serif 4', Georgia, serif;
  --font-body: 'IBM Plex Sans', -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --container: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

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

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

a {
  color: var(--green);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover { color: var(--red); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.4rem, 5vw, 3.6rem); font-weight: 600; }
h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1em; color: var(--ink-70); }
.lede { font-size: 1.15rem; color: var(--ink); }

.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

/* --- Skip link ------------------------------------------------------------ */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 12px 20px;
  text-decoration: none;
  border-radius: 0 0 3px 0;
}
.skip-link:focus {
  left: 0;
}

/* --- Eyebrow / marginalia label ------------------------------------------ */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--red);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "⁁";
  font-size: 1rem;
  color: var(--red);
}

/* --- Header ---------------------------------------------------------------*/
header.site-header {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 40;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.brand span { color: var(--red); }
.brand-mark { height: 34px; width: auto; display: block; }
.footer-logo { height: 46px; width: auto; display: block; margin-bottom: 14px; }
.nav-links {
  display: flex;
  gap: 30px;
  list-style: none;
  margin: 0; padding: 0;
  font-size: 0.95rem;
}
.nav-links a {
  color: var(--ink);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--red);
  border-bottom-color: var(--red);
}
.nav-cta {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  border: 1px solid var(--ink);
  padding: 9px 18px;
  border-radius: 2px;
  text-decoration: none;
  color: var(--ink);
  white-space: nowrap;
}
.nav-cta:hover { background: var(--ink); color: var(--paper); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; }

@media (max-width: 860px) {
  .nav-links { position: fixed; inset: 64px 0 0 0; background: var(--paper);
    flex-direction: column; padding: 30px 28px; gap: 22px; font-size: 1.1rem;
    transform: translateY(-110%); transition: transform 0.25s ease; }
  .nav-links.open { transform: translateY(0); }
  .nav-toggle { display: block; }
  .nav-cta { display: none; }
}

/* --- Buttons --------------------------------------------------------------*/
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 13px 24px;
  border-radius: 2px;
  text-decoration: none;
  border: 1px solid var(--ink);
  cursor: pointer;
}
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--red); border-color: var(--red); color: var(--white); }
.btn-ghost { color: var(--ink); background: transparent; }
.btn-ghost:hover { background: var(--paper-dim); color: var(--ink); }

/* --- Hero ------------------------------------------------------------------*/
.hero {
  padding: 90px 0 70px;
  border-bottom: 1px solid var(--rule);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; gap: 40px; } }

.hero h1 { color: var(--ink); }
.hero .lede { max-width: 46ch; margin-bottom: 1.6em; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* Signature element: the markup line — a sentence being corrected live */
.markup-card {
  background: var(--white);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 32px 30px;
  box-shadow: 0 1px 0 var(--rule);
}
.markup-card .tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-70);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 18px;
  display: block;
}
.markup-line {
  font-family: var(--font-display);
  font-size: 1.15rem;
  line-height: 1.9;
  color: var(--ink-70);
}
.markup-line .del {
  color: var(--red);
  text-decoration: line-through;
  text-decoration-color: var(--red);
  opacity: 0.75;
}
.markup-line .ins {
  color: var(--green);
  font-weight: 600;
  background: var(--green-dim);
  padding: 0 4px;
  border-radius: 2px;
}
.markup-line .caret { color: var(--red); font-weight: 700; }
.markup-note {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px dashed var(--rule);
  font-size: 0.9rem;
  color: var(--ink-70);
}

/* --- Trust strip ------------------------------------------------------------*/
.trust-strip {
  border-bottom: 1px solid var(--rule);
  background: var(--paper-dim);
}
.trust-strip .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 40px;
  padding: 20px 28px;
  justify-content: space-between;
}
.trust-item {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-70);
  display: flex;
  align-items: center;
  gap: 8px;
}
.trust-item::before { content: "—"; color: var(--red); }

/* --- Section shell ---------------------------------------------------------*/
section { padding: 76px 0; border-bottom: 1px solid var(--rule); }
section:last-of-type { border-bottom: none; }
.section-head { max-width: 640px; margin-bottom: 46px; }

/* --- Service list (numbered — content is genuinely a discrete list) --------*/
.service-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
@media (max-width: 760px) { .service-list { grid-template-columns: 1fr; } }
.service-item {
  background: var(--paper);
  padding: 32px;
}
.service-item .num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--red);
  display: block;
  margin-bottom: 10px;
}
.service-item h3 { margin-bottom: 10px; }
.service-item p { margin-bottom: 0; font-size: 0.96rem; }

/* --- Pricing table -----------------------------------------------------------*/
.price-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  background: var(--white);
  border: 1px solid var(--rule);
}
.price-table th, .price-table td {
  text-align: left;
  padding: 16px 18px;
  border-bottom: 1px solid var(--rule);
}
.price-table th {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-70);
  background: var(--paper-dim);
}
.price-table td.fee { font-family: var(--font-mono); color: var(--ink); }
.price-table tr:last-child td { border-bottom: none; }
.price-note { font-size: 0.88rem; color: var(--ink-70); margin-top: 14px; }

/* --- Review tier cards ---------------------------------------------------- */
.tier-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
@media (max-width: 900px) { .tier-grid { grid-template-columns: 1fr; } }
.tier-card {
  border: 1px solid var(--rule);
  background: var(--white);
  padding: 28px;
  border-radius: 3px;
}
.tier-card h3 { margin-bottom: 12px; }
.tier-card p { font-size: 0.94rem; }
.tier-card.featured { border-color: var(--green); box-shadow: 0 0 0 1px var(--green); }
.tier-card .kicker {
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--green); margin-bottom: 8px; display: block;
}

/* --- Steps ----------------------------------------------------------------*/
.steps { display: flex; flex-direction: column; gap: 0; }
.step {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 20px;
  padding: 22px 0;
  border-top: 1px solid var(--rule);
}
.step:last-child { border-bottom: 1px solid var(--rule); }
.step .num { font-family: var(--font-mono); color: var(--red); font-size: 1.1rem; }
.step h3 { margin-bottom: 6px; font-size: 1.05rem; }
.step p { margin-bottom: 0; font-size: 0.95rem; }

/* --- Quote / margin annotation ---------------------------------------------*/
.margin-quote {
  border-left: 2px solid var(--red);
  padding-left: 20px;
  margin: 0 0 1.4em;
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--ink);
}

/* --- Testimonials empty state ---------------------------------------------*/
.testimonial-empty {
  border: 1px dashed var(--rule);
  border-radius: 3px;
  padding: 40px;
  text-align: center;
  background: var(--paper-dim);
}
.testimonial-empty .eyebrow { justify-content: center; }
.testimonial-empty p { max-width: 46ch; margin: 0 auto; }

/* --- Blog empty state -------------------------------------------------------*/
.blog-empty {
  border: 1px solid var(--rule);
  background: var(--white);
  padding: 48px;
  text-align: center;
  border-radius: 3px;
}

/* --- CTA band ----------------------------------------------------------------*/
.cta-band {
  background: var(--ink);
  color: var(--paper);
  border-bottom: none;
}
.cta-band h2 { color: var(--paper); }
.cta-band p { color: #C7CEDA; }
.cta-band .btn-primary { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.cta-band .btn-primary:hover { background: var(--red); color: var(--white); border-color: var(--red); }
.cta-band .btn-ghost { color: var(--paper); border-color: #8B98AE; }
.cta-band .btn-ghost:hover { background: rgba(255,255,255,0.08); }

/* --- Form -------------------------------------------------------------------*/
.form-grid { display: grid; gap: 18px; max-width: 560px; }
label { font-family: var(--font-mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-70); display: block; margin-bottom: 6px; }
input, select, textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 12px 14px;
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  background: var(--white);
  color: var(--ink);
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--green); outline-offset: 1px; }
textarea { resize: vertical; min-height: 130px; }
.form-status { font-size: 0.9rem; margin-top: 10px; display: none; }

/* --- Footer -------------------------------------------------------------------*/
footer.site-footer {
  background: var(--paper-dim);
  padding: 50px 0 30px;
  font-size: 0.9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--rule);
}
@media (max-width: 700px) { .footer-grid { grid-template-columns: 1fr; gap: 26px; } }
.footer-grid h4 { font-family: var(--font-mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-70); margin-bottom: 14px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.footer-grid a { color: var(--ink-70); text-decoration: none; }
.footer-grid a:hover { color: var(--red); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 22px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-70);
}

/* --- Legal page ----------------------------------------------------------------*/
.legal h2 { font-size: 1.3rem; margin-top: 1.6em; }
.legal ul { color: var(--ink-70); }
.legal { max-width: 760px; }

/* --- Reduced motion / focus -------------------------------------------------*/
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}