/* SYNiq public website. Ivory, brick and yellow, with sage and clay as companions. */

:root {
  --ivory: #fbf7ee;
  --ivory-2: #f4ecdc;
  --ivory-3: #ebe0ca;
  --brick: #a63d2a;
  --brick-dark: #7e2c1e;
  --brick-soft: #f3d9cf;
  --yellow: #f2b630;
  --yellow-soft: #fce7ae;
  --sage: #4f7a55;
  --sage-soft: #dbe8d6;
  --clay: #c9793f;
  --ink: #2b211c;
  --ink-2: #4a3d35;
  --muted: #6e6056;
  --line: #e2d6bf;
  --white: #fffdf8;

  --font-head: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Atkinson Hyperlegible", "Segoe UI", system-ui, sans-serif;
  --font-easy: "Lexend", "Atkinson Hyperlegible", system-ui, sans-serif;

  --radius: 18px;
  --radius-s: 10px;
  --shadow: 0 1px 2px rgba(43, 33, 28, 0.06), 0 8px 24px rgba(43, 33, 28, 0.07);
  --max: 1120px;
  --text-scale: 1;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--ivory);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: calc(1.0625rem * var(--text-scale));
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--brick); text-underline-offset: 3px; }
a:hover { color: var(--brick-dark); }

:focus-visible {
  outline: 3px solid var(--yellow);
  outline-offset: 2px;
  border-radius: 6px;
}

h1, h2, h3 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
  color: var(--ink);
}
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

.skip {
  position: absolute; left: -999px; top: 8px;
  background: var(--ink); color: var(--ivory); padding: 8px 14px; border-radius: 8px; z-index: 50;
}
.skip:focus { left: 8px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(251, 247, 238, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; gap: 16px; min-height: 66px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-mark { width: 34px; height: 34px; flex: none; }
.brand-name { font-family: var(--font-head); font-size: 1.45rem; font-weight: 700; letter-spacing: -0.02em; }
.brand-name em { font-style: normal; color: var(--brick); }
.brand-by { font-size: 0.72rem; color: var(--muted); letter-spacing: 0.08em; text-transform: uppercase; }

.nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.nav a {
  text-decoration: none; color: var(--ink-2); padding: 8px 12px; border-radius: 999px; font-size: 0.97rem;
}
.nav a:hover { background: var(--ivory-2); color: var(--ink); }
.nav a[aria-current="page"] { color: var(--brick); font-weight: 700; }
.nav .btn { margin-left: 6px; }
.nav-toggle {
  display: none; margin-left: auto; background: none; border: 1px solid var(--line);
  border-radius: 10px; padding: 8px 10px; font: inherit; color: var(--ink); cursor: pointer;
}

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    display: none; position: absolute; left: 0; right: 0; top: 66px;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--ivory); border-bottom: 1px solid var(--line); padding: 8px 16px 16px;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px; border-radius: 10px; }
  .nav .btn { margin: 8px 0 0; text-align: center; }
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: inherit; font-weight: 700; text-decoration: none; cursor: pointer;
  padding: 12px 22px; border-radius: 999px; border: 2px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--brick); color: var(--white); }
.btn-primary:hover { background: var(--brick-dark); color: var(--white); }
.btn-yellow { background: var(--yellow); color: var(--ink); }
.btn-yellow:hover { background: #e5a51c; color: var(--ink); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--ink-2); }
.btn-ghost:hover { background: var(--ivory-2); color: var(--ink); }
.btn-small { padding: 8px 16px; font-size: 0.95rem; }

/* Sections */
section { padding: 88px 0; }
.section-alt { background: var(--ivory-2); }
.section-brick { background: var(--brick); color: var(--white); }
.section-brick h2, .section-brick h3 { color: var(--white); }
.section-brick a { color: var(--yellow-soft); }
.eyebrow {
  display: inline-block; font-size: 0.8rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--brick); margin-bottom: 14px;
}
.section-brick .eyebrow { color: var(--yellow); }
.lead { font-size: 1.2em; color: var(--ink-2); max-width: 46em; }
.section-brick .lead { color: #fbe9e2; }
.center { text-align: center; }
.center .lead { margin-left: auto; margin-right: auto; }

/* Hero */
.hero { padding: 72px 0 80px; overflow: hidden; }
.hero .wrap { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.hero h1 em { font-style: italic; color: var(--brick); }
.hero .lead { margin-bottom: 28px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-note { margin-top: 22px; font-size: 0.95rem; color: var(--muted); }
.hero-art {
  background: var(--white); border: 1px solid var(--line); border-radius: 26px; padding: 22px;
  box-shadow: var(--shadow); position: relative;
}
.hero-art::before {
  content: ""; position: absolute; inset: auto -40px -40px auto; width: 180px; height: 180px;
  background: var(--yellow-soft); border-radius: 50%; z-index: -1;
}
.hero-art .chat-peek { display: grid; gap: 10px; margin-top: 14px; font-size: 0.95rem; }
.peek { padding: 10px 14px; border-radius: 14px; max-width: 92%; }
.peek-student { background: var(--ivory-2); justify-self: end; }
.peek-tutor { background: var(--sage-soft); }
@media (max-width: 860px) {
  .hero { padding-top: 40px; }
  .hero .wrap { grid-template-columns: 1fr; gap: 36px; }
}

/* Cards and grids */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 960px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 860px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }
@media (max-width: 520px) { .grid-4 { grid-template-columns: 1fr; } }

.card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow);
}
.card p:last-child { margin-bottom: 0; }
.card .icon {
  width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 14px;
  background: var(--yellow-soft); color: var(--brick-dark);
}
.card .icon svg { width: 24px; height: 24px; }
.card.tone-sage .icon { background: var(--sage-soft); color: var(--sage); }
.card.tone-brick .icon { background: var(--brick-soft); color: var(--brick); }
.section-head { margin-bottom: 44px; }

/* Steps */
.steps { counter-reset: step; display: grid; gap: 18px; grid-template-columns: repeat(4, 1fr); }
@media (max-width: 960px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }
.step { background: var(--white); border-radius: var(--radius); padding: 24px; border: 1px solid var(--line); }
.step::before {
  counter-increment: step; content: counter(step);
  display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%;
  background: var(--brick); color: var(--white); font-weight: 700; margin-bottom: 14px; font-family: var(--font-head);
}

/* Mistake showcase */
.showcase { display: grid; grid-template-columns: 1fr 1.1fr; gap: 40px; align-items: center; }
@media (max-width: 860px) { .showcase { grid-template-columns: 1fr; } }
.showcase-panel { background: var(--white); border-radius: 22px; padding: 20px; border: 1px solid var(--line); box-shadow: var(--shadow); }
.check-list { list-style: none; padding: 0; margin: 0 0 1em; display: grid; gap: 12px; }
.check-list li { position: relative; padding-left: 34px; }
.check-list li::before {
  content: ""; position: absolute; left: 0; top: 0.2em; width: 22px; height: 22px; border-radius: 50%;
  background: var(--sage-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234f7a55' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 12l4 4 8-8'/%3E%3C/svg%3E") center / 14px no-repeat;
}
.section-brick .check-list li::before { background-color: rgba(255, 255, 255, 0.92); }

/* Quote */
.vision {
  font-family: var(--font-head); font-size: clamp(1.6rem, 3.6vw, 2.6rem); line-height: 1.25; font-style: italic;
  max-width: 22em; margin: 0 auto 18px;
}
.vision-by { color: var(--yellow-soft); font-size: 1rem; }

/* Pills */
.pill-row { display: flex; flex-wrap: wrap; gap: 10px; }
.pill {
  display: inline-block; padding: 8px 14px; border-radius: 999px; background: var(--white);
  border: 1px solid var(--line); font-size: 0.95rem;
}

/* CTA band */
.cta { background: var(--yellow); padding: 64px 0; }
.cta .wrap { display: flex; gap: 24px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.cta h2 { margin: 0; }
.cta p { margin: 6px 0 0; color: var(--ink-2); }

/* Footer */
.site-footer { background: var(--ink); color: #e9dfcf; padding: 48px 0 32px; font-size: 0.95rem; }
.site-footer a { color: var(--yellow-soft); }
.site-footer .wrap { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 28px; }
.site-footer h3 { color: var(--ivory); font-size: 1rem; font-family: var(--font-body); font-weight: 700; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.site-footer .fine { grid-column: 1 / -1; border-top: 1px solid #4a3d35; padding-top: 18px; color: #b9ab98; font-size: 0.85rem; }
@media (max-width: 760px) { .site-footer .wrap { grid-template-columns: 1fr; } }

/* Prose pages */
.prose { max-width: 760px; }
.prose h2 { font-size: 1.6rem; margin-top: 1.6em; }
.prose ul { padding-left: 1.2em; }
.prose li { margin-bottom: 0.4em; }
.page-head { padding: 56px 0 24px; }
.page-body { padding: 8px 0 80px; }

/* Tutor diagrams (drawn by js/diagram.js) */
.sq-diagram { margin: 12px 0 4px; }
.sq-diagram figcaption { font-weight: 700; margin-bottom: 8px; color: var(--ink); }
.sq-panels { display: grid; gap: 12px; grid-template-columns: 1fr; }
.sq-panels[data-count="2"] { grid-template-columns: 1fr 1fr; }
.sq-panels[data-count="3"] { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 560px) { .sq-panels[data-count="2"], .sq-panels[data-count="3"] { grid-template-columns: 1fr; } }
.sq-panel { background: var(--white); border: 2px solid var(--line); border-radius: 14px; padding: 10px 10px 8px; }
.sq-panel.sq-try { border-color: #ecc29f; background: #fffaf3; }
.sq-panel.sq-right { border-color: #b9d3b2; background: #f9fcf7; }
.sq-chip {
  display: inline-block; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.04em;
  padding: 3px 10px; border-radius: 999px; background: var(--ivory-2); color: var(--ink-2); margin-bottom: 4px;
}
.sq-try .sq-chip { background: #f6dcc4; color: #7a3f14; }
.sq-right .sq-chip { background: var(--sage-soft); color: #2f5135; }
.sq-svg { display: block; width: 100%; height: auto; }
.sq-note { margin: 6px 2px 0; font-size: 0.92em; color: var(--ink-2); }
.sq-alt { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.sq-pulse { animation: sq-pulse 2.2s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
@keyframes sq-pulse { 50% { transform: scale(1.12); } }