/*
 * Zero to Hero — Technique page styles
 * Shared by all technique-level pages.
 * Keep site-wide primitives in style.css; keep technique-specific layout here.
 */

.technique-page {
  background: var(--paper, #fafafa);
}

.technique-hero {
  background: var(--secondary, #797979);
  color: #fff;
  padding: 92px 0 82px;
}

.technique-hero .section-kicker {
  color: var(--primary, #ea127e);
}

.technique-hero h1 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(46px, 6vw, 76px);
  line-height: .98;
  letter-spacing: -.055em;
}

.technique-hero p:last-child {
  max-width: 700px;
  margin: 24px 0 0;
  color: #e4e4e4;
  font-size: 18px;
  line-height: 1.65;
}

.technique-level {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 22px;
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.technique-level::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary, #ea127e);
}

.technique-intro {
  padding: 76px 0 30px;
}

.technique-intro-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 60px;
  align-items: start;
}

.technique-intro h2,
.technique-section h2 {
  margin: 0 0 16px;
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.04;
  letter-spacing: -.045em;
}

.technique-lead {
  max-width: 720px;
  margin: 0;
  font-size: 20px;
  line-height: 1.65;
  color: var(--muted, #797979);
}

.technique-question {
  border: 1px solid var(--line, #e3e3e3);
  border-radius: var(--radius, 15px);
  background: #fff;
  padding: 28px;
}

.technique-question-label,
.technique-card-label {
  margin: 0 0 9px;
  color: var(--primary, #ea127e);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.technique-question p:last-child {
  margin: 0;
  font-size: 21px;
  line-height: 1.35;
  font-weight: 700;
}

.technique-section {
  padding: 72px 0;
}

.technique-section.alt {
  background: #f1f1f1;
}

.technique-section-heading {
  max-width: 720px;
  margin-bottom: 34px;
}

.technique-section-heading p {
  margin: 0;
  color: var(--muted, #797979);
  font-size: 17px;
  line-height: 1.65;
}

.technique-why {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.technique-card {
  border: 1px solid var(--line, #e3e3e3);
  border-radius: var(--radius, 15px);
  background: #fff;
  padding: 28px;
}

.technique-card h3 {
  margin: 0 0 10px;
  font-size: 22px;
  line-height: 1.15;
}

.technique-card p {
  margin: 0;
  color: var(--muted, #797979);
  line-height: 1.6;
}

.technique-steps {
  display: grid;
  gap: 16px;
}

.technique-step {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 20px;
  align-items: start;
  padding: 25px 0;
  border-top: 1px solid var(--line, #e3e3e3);
}

.technique-step:last-child {
  border-bottom: 1px solid var(--line, #e3e3e3);
}

.technique-step-number {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--primary-soft, #fde2ef);
  color: var(--primary, #ea127e);
  font-weight: 800;
}

.technique-step h3 {
  margin: 0 0 7px;
  font-size: 21px;
}

.technique-step p {
  margin: 0;
  color: var(--muted, #797979);
  line-height: 1.65;
}

.technique-demo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.technique-demo {
  border: 1px solid var(--line, #e3e3e3);
  border-radius: var(--radius, 15px);
  background: #fff;
  padding: 20px;
}

.technique-demo h3 {
  margin: 18px 0 8px;
  font-size: 20px;
}

.technique-demo p {
  margin: 0;
  color: var(--muted, #797979);
  line-height: 1.6;
}

.mini-sudoku {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  width: min(100%, 300px);
  aspect-ratio: 1;
  margin: 0 auto;
  border: 2px solid var(--secondary, #797979);
  background: var(--secondary, #797979);
  gap: 1px;
}

.mini-cell {
  display: grid;
  place-items: center;
  min-width: 0;
  background: #fff;
  color: var(--ink, #3f3f3f);
  font-size: clamp(11px, 2vw, 18px);
  font-weight: 700;
}

.mini-cell.empty { color: transparent; }
.mini-cell.target {
  background: var(--primary-soft, #fde2ef);
  color: var(--primary, #ea127e);
  box-shadow: inset 0 0 0 2px var(--primary, #ea127e);
}
.mini-cell.soft { background: #f4f4f4; }

.mini-cell:nth-child(3n) { border-right: 2px solid var(--secondary, #797979); }
.mini-cell:nth-child(9n) { border-right: 0; }
.mini-cell:nth-child(n + 19):nth-child(-n + 27),
.mini-cell:nth-child(n + 46):nth-child(-n + 54) { border-bottom: 2px solid var(--secondary, #797979); }

.walkthrough {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: center;
  padding: 28px;
  border: 1px solid var(--line, #e3e3e3);
  border-radius: var(--radius, 15px);
  background: #fff;
}

.walkthrough + .walkthrough { margin-top: 18px; }
.walkthrough.reverse .walkthrough-visual { order: 2; }

.walkthrough-copy h3 {
  margin: 0 0 12px;
  font-size: 25px;
}

.walkthrough-copy p {
  margin: 0 0 12px;
  color: var(--muted, #797979);
  line-height: 1.65;
}

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

.technique-history {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 40px;
  align-items: start;
}

.history-mark {
  color: var(--primary, #ea127e);
  font-size: 52px;
  line-height: 1;
  font-weight: 800;
  letter-spacing: -.05em;
}

.technique-history h2 { margin-bottom: 12px; }
.technique-history p { color: var(--muted, #797979); line-height: 1.7; }

.technique-video {
  display: grid;
  grid-template-columns: 90px 1fr auto;
  gap: 24px;
  align-items: center;
  border-radius: var(--radius, 15px);
  background: var(--secondary, #797979);
  color: #fff;
  padding: 28px;
}

.video-mark {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--primary, #ea127e);
  font-size: 22px;
}

.technique-video h3 { margin: 0 0 6px; font-size: 22px; }
.technique-video p { margin: 0; color: #dedede; line-height: 1.55; }
.technique-video .button { background: #fff; color: var(--secondary, #797979); }

.technique-practice {
  text-align: center;
  padding: 72px 0 88px;
}

.technique-practice-inner {
  max-width: 760px;
  margin: 0 auto;
}

.technique-practice h2 { margin-bottom: 14px; }
.technique-practice p { color: var(--muted, #797979); line-height: 1.65; }

.technique-template-note {
  margin: 30px auto 0;
  max-width: 760px;
  padding: 18px 20px;
  border-left: 3px solid var(--primary, #ea127e);
  background: var(--primary-soft, #fde2ef);
  color: var(--ink, #3f3f3f);
  text-align: left;
}

@media (max-width: 900px) {
  .technique-intro-grid,
  .walkthrough,
  .technique-history { grid-template-columns: 1fr; }
  .technique-why,
  .technique-demo-grid { grid-template-columns: 1fr; }
  .walkthrough.reverse .walkthrough-visual { order: 0; }
  .technique-history { gap: 16px; }
  .technique-video { grid-template-columns: 70px 1fr; }
  .technique-video .button { grid-column: 2; justify-self: start; }
}

@media (max-width: 560px) {
  .technique-hero { padding: 70px 0 62px; }
  .technique-intro,
  .technique-section,
  .technique-practice { padding-top: 58px; padding-bottom: 58px; }
  .technique-step { grid-template-columns: 44px 1fr; gap: 14px; }
  .technique-step-number { width: 40px; height: 40px; }
  .technique-video { grid-template-columns: 1fr; }
  .technique-video .button { grid-column: auto; }
}

/* Technique image placeholders and basic index cards */
.technique-image { display: block; width: 100%; height: auto; border-radius: var(--radius); border: 1px solid var(--line); background: #f1f1f1; }
.technique-link-card { display: block; padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; color: var(--ink); text-decoration: none; transition: transform .2s ease, border-color .2s ease; }
.technique-link-card:hover { transform: translateY(-2px); border-color: var(--primary); }
.technique-link-card h3 { margin: 8px 0 10px; font-size: 30px; letter-spacing: -.03em; }
.technique-link-card p:not(.technique-card-label) { color: var(--muted); }
.technique-link-card span { display: inline-block; margin-top: 12px; color: var(--primary); font-weight: 800; }

.technique-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.technique-meta span { display: inline-flex; align-items: center; padding: 8px 12px; border: 1px solid rgba(255,255,255,.28); border-radius: 999px; color: #fff; font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.technique-callout { margin-top: 22px !important; padding: 18px 20px; border-left: 3px solid var(--primary, #ea127e); background: var(--primary-soft, #fde2ef); color: var(--ink, #3f3f3f) !important; }
.technique-card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
@media (max-width: 700px) { .technique-card-grid { grid-template-columns: 1fr; } }