/* Focused /app landing page. Base tokens and shared navigation/footer live in ../styles.css. */

.app-page {
  overflow-x: hidden;
}

.study-hero {
  position: relative;
  padding: 86px 0 94px;
  border-bottom: 1px solid var(--rule);
  isolation: isolate;
}

.study-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  width: 620px;
  height: 620px;
  right: -250px;
  top: -290px;
  border: 1px solid var(--rule);
  border-radius: 50%;
  box-shadow: 0 0 0 80px color-mix(in srgb, var(--paper-deep) 48%, transparent),
              0 0 0 160px color-mix(in srgb, var(--paper-deep) 22%, transparent);
}

.study-hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: minmax(0, 0.93fr) minmax(460px, 1.07fr);
  gap: 66px;
  align-items: center;
}

.study-hero .kicker {
  display: block;
  margin-bottom: 21px;
}

.study-hero h1 {
  max-width: 760px;
  margin: 0 0 24px;
  font-size: clamp(2.65rem, 5.5vw, 4.7rem);
  font-variation-settings: "opsz" 144, "SOFT" 24, "wght" 540;
  line-height: 0.98;
}

.study-hero h1 em {
  color: var(--seed);
  font-style: italic;
  font-variation-settings: "opsz" 144, "SOFT" 60, "wght" 500;
}

.study-lead {
  max-width: 32em;
  margin: 0 0 32px;
  color: var(--ink-soft);
  font-size: 1.2rem;
  line-height: 1.58;
}

.trust-line {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 21px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  color: var(--ink-faint);
  font: 0.68rem/1.4 var(--font-mono);
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.trust-line li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.trust-line li::before {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--seed);
  transform: rotate(45deg);
}

.workspace-demo {
  position: relative;
  overflow: hidden;
  background: var(--paper-card);
  border: 1px solid var(--rule-strong);
  border-radius: 4px;
  box-shadow: 0 32px 70px -42px rgba(15, 26, 43, 0.6);
  animation: workspace-arrive 0.7s ease-out both;
}

.demo-bar {
  min-height: 46px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--rule);
  color: var(--ink-soft);
  font: 0.68rem/1 var(--font-mono);
  letter-spacing: 0.04em;
}

.demo-mark {
  width: 9px;
  height: 9px;
  background: var(--seed);
  transform: rotate(45deg);
}

.demo-local {
  margin-left: auto;
  padding: 5px 7px;
  border: 1px solid var(--rule);
  color: var(--seed);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.demo-body {
  min-height: 340px;
  display: grid;
  grid-template-columns: 165px 1fr;
}

.demo-files {
  padding: 23px 13px;
  border-right: 1px solid var(--rule);
  background: var(--paper-deep);
}

.demo-label {
  margin: 0 7px 15px;
  color: var(--ink-faint);
  font: 0.58rem/1.3 var(--font-mono);
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.demo-file {
  display: grid;
  grid-template-columns: 34px 1fr;
  align-items: center;
  gap: 7px;
  margin-bottom: 4px;
  padding: 9px 7px;
  border-left: 2px solid transparent;
}

.demo-file.active {
  border-left-color: var(--seed);
  background: var(--paper-card);
}

.demo-file span {
  color: var(--gloss);
  font: 0.52rem/1 var(--font-mono);
  letter-spacing: 0.05em;
}

.demo-file b {
  overflow: hidden;
  color: var(--ink-soft);
  font: 0.67rem/1.3 var(--font-mono);
  font-weight: 400;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.demo-file.active b { color: var(--ink); }

.demo-reader {
  position: relative;
  padding: 28px 30px 24px;
}

.demo-reader-meta {
  display: flex;
  justify-content: space-between;
  color: var(--ink-faint);
  font: 0.6rem/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.demo-reader > p {
  margin: 41px 0 28px;
  font-family: var(--font-read);
  font-size: clamp(1.4rem, 2.5vw, 1.85rem);
  line-height: 1.55;
}

.demo-reader > p::first-letter { color: var(--seed); }

.lookup-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  padding: 15px 16px;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--gloss);
  background: var(--paper);
}

.lookup-card div { display: grid; gap: 2px; }
.lookup-card strong { font-family: var(--font-display); font-size: 1.03rem; font-weight: 560; }
.lookup-card span { color: var(--ink-soft); font: 0.67rem/1.4 var(--font-mono); }

.lookup-card button {
  padding: 7px 9px;
  border: 1px solid var(--rule-strong);
  background: transparent;
  color: var(--seed);
  font: 0.57rem/1 var(--font-mono);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.demo-progress {
  position: absolute;
  right: 30px;
  bottom: 23px;
  left: 30px;
  height: 2px;
  background: var(--rule);
}

.demo-progress span {
  display: block;
  width: 62%;
  height: 100%;
  background: var(--seed);
}

.demo-loop {
  display: flex;
  align-items: center;
  padding: 14px 18px;
  border-top: 1px solid var(--rule);
  background: var(--paper);
}

.demo-loop span {
  color: var(--ink-faint);
  font: 0.57rem/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.demo-loop span.complete,
.demo-loop span.current { color: var(--seed); }
.demo-loop span.current { font-weight: 500; }

.demo-loop i {
  flex: 1;
  height: 1px;
  margin: 0 8px;
  background: var(--rule-strong);
}

.demo-loop span.complete + i { background: var(--seed); }

@keyframes workspace-arrive {
  from { opacity: 0; transform: translateY(12px) rotate(0.4deg); }
  to { opacity: 1; transform: none; }
}

.friction-strip {
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
  background: var(--paper-deep);
}

.friction-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.friction-grid p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.86rem;
  line-height: 1.5;
}

.friction-grid strong { color: var(--ink); font-weight: 500; }

.study-problem {
  padding: 94px 0;
  border-bottom: 1px solid var(--rule);
}

.problem-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 100px;
  align-items: end;
}

.problem-grid .section-head { margin: 0; }
.problem-copy p { margin: 0 0 16px; color: var(--ink-soft); }
.problem-copy .problem-lead { color: var(--ink); font-size: 1.16rem; line-height: 1.55; }

.study-workflow {
  padding: 94px 0 104px;
  border-bottom: 1px solid var(--rule);
  background: var(--paper-deep);
}

.study-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--rule-strong);
  list-style: none;
}

.study-steps li {
  position: relative;
  min-height: 260px;
  padding: 27px 22px 28px;
  border-right: 1px solid var(--rule);
}

.study-steps li:first-child { padding-left: 0; }
.study-steps li:last-child { padding-right: 0; border-right: 0; }

.step-number {
  display: block;
  margin-bottom: 42px;
  color: var(--seed);
  font: 0.7rem/1 var(--font-mono);
  letter-spacing: 0.1em;
}

.study-steps h3 { margin: 0 0 9px; font-size: 1.16rem; }
.study-steps p { margin: 0; color: var(--ink-soft); font-size: 0.93rem; line-height: 1.58; }

.material-section {
  padding: 94px 0;
  border-bottom: 1px solid var(--rule);
}

.material-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 100px;
  align-items: center;
}

.material-layout h2 {
  margin: 15px 0 15px;
  font-size: clamp(1.9rem, 3.6vw, 2.7rem);
  line-height: 1.12;
}

.material-layout > div > p { max-width: 36em; color: var(--ink-soft); font-size: 1.08rem; }

.format-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 25px;
  padding: 0;
  list-style: none;
}

.format-cloud li {
  padding: 7px 10px;
  border: 1px solid var(--rule);
  color: var(--ink-soft);
  font: 0.64rem/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ownership-note {
  position: relative;
  margin: 0;
  padding: 42px 42px 38px;
  border: 1px solid var(--rule-strong);
  border-top: 3px solid var(--seed);
  background: var(--paper-card);
  box-shadow: 0 24px 54px -42px rgba(15, 26, 43, 0.58);
}

.quote-mark {
  position: absolute;
  top: 6px;
  left: 24px;
  color: var(--gloss-soft);
  font: 7rem/1 var(--font-display);
}

.ownership-note p {
  position: relative;
  margin: 0 0 18px;
  font: italic 1.62rem/1.4 var(--font-display);
}

.ownership-note footer {
  color: var(--gloss);
  font: 0.66rem/1.4 var(--font-mono);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.use-cases {
  padding: 94px 0;
  border-bottom: 1px solid var(--rule);
  background: var(--paper-deep);
}

.use-case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--rule);
  background: var(--rule);
  gap: 1px;
}

.use-case-grid article {
  min-height: 260px;
  padding: 30px 29px;
  background: var(--paper);
}

.case-tag {
  display: block;
  margin-bottom: 50px;
  color: var(--gloss);
  font: 0.64rem/1 var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.use-case-grid h3 { margin: 0 0 10px; font-size: 1.24rem; }
.use-case-grid p { margin: 0; color: var(--ink-soft); font-size: 0.96rem; line-height: 1.62; }

.study-privacy {
  padding: 100px 0;
  border-bottom: 1px solid var(--rule);
}

.privacy-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  gap: 100px;
}

.privacy-thesis h2 {
  margin: 15px 0;
  font-size: clamp(2rem, 3.8vw, 2.9rem);
  line-height: 1.08;
}

.privacy-thesis p { margin: 0 0 27px; color: var(--ink-soft); font-size: 1.08rem; }

.privacy-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px 30px;
}

.privacy-points div {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 11px;
  padding-top: 17px;
  border-top: 1px solid var(--rule);
}

.privacy-points span { color: var(--seed); font: 0.68rem/1.6 var(--font-mono); }
.privacy-points p { margin: 0; color: var(--ink-soft); font-size: 0.94rem; line-height: 1.58; }
.privacy-points strong { color: var(--ink); font-weight: 500; }

.study-closing {
  position: relative;
  overflow: hidden;
  padding: 84px 0;
  background: var(--ink);
  color: var(--paper);
}

.study-closing::after {
  content: "";
  position: absolute;
  width: 360px;
  height: 360px;
  right: -120px;
  bottom: -220px;
  border: 1px solid color-mix(in srgb, var(--paper) 13%, transparent);
  border-radius: 50%;
  box-shadow: 0 0 0 64px color-mix(in srgb, var(--paper) 4%, transparent);
}

.study-closing-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 64px;
}

.study-closing .kicker { display: block; color: var(--gloss-on-dark); margin-bottom: 17px; }
.study-closing h2 { margin: 0; color: var(--on-dark); font-size: clamp(2rem, 4vw, 3.15rem); line-height: 1.05; }
.study-closing p { max-width: 32em; margin: 18px 0 0; color: color-mix(in srgb, var(--on-dark) 72%, transparent); }

.closing-action {
  position: relative;
  z-index: 1;
  flex: 0 0 auto;
  display: grid;
  gap: 12px;
  justify-items: start;
}

.study-closing .btn-primary {
  background: var(--on-dark);
  border-color: var(--on-dark);
  color: var(--on-dark-ink);
}

.study-closing .btn-primary:hover { background: #fff; border-color: #fff; }

.closing-action span {
  max-width: 240px;
  color: color-mix(in srgb, var(--paper) 50%, transparent);
  font: 0.61rem/1.5 var(--font-mono);
}

.app-footer { padding-top: 52px; }

@media (prefers-color-scheme: dark) {
  .study-closing { background: #08111c; }
  .workspace-demo,
  .ownership-note { box-shadow: none; }
}

@media (max-width: 980px) {
  .study-hero-inner { grid-template-columns: 1fr; gap: 58px; }
  .study-hero-copy { max-width: 720px; }
  .workspace-demo { width: min(680px, 100%); }
  .problem-grid,
  .material-layout,
  .privacy-layout { gap: 58px; }
  .study-steps { grid-template-columns: repeat(2, 1fr); border-top: 0; }
  .study-steps li { min-height: 220px; border: 1px solid var(--rule); margin: -0.5px; padding: 24px; }
  .study-steps li:first-child,
  .study-steps li:last-child { padding: 24px; border-right: 1px solid var(--rule); }
  .step-number { margin-bottom: 30px; }
}

@media (max-width: 760px) {
  .study-hero { padding: 60px 0 66px; }
  .study-hero-inner,
  .study-closing-inner { padding: 0 20px; }
  .study-hero h1 { font-size: clamp(2.6rem, 13vw, 4rem); }
  .friction-grid,
  .problem-grid,
  .material-layout,
  .use-case-grid,
  .privacy-layout { grid-template-columns: 1fr; }
  .friction-grid { gap: 13px; }
  .study-problem,
  .study-workflow,
  .material-section,
  .use-cases,
  .study-privacy { padding: 70px 0; }
  .problem-grid,
  .material-layout,
  .privacy-layout { gap: 38px; }
  .use-case-grid article { min-height: auto; }
  .case-tag { margin-bottom: 28px; }
  .study-closing-inner { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 560px) {
  .demo-body { min-height: 300px; grid-template-columns: 1fr; }
  .demo-files { display: none; }
  .demo-reader { padding: 24px 22px; }
  .demo-reader > p { margin: 34px 0 24px; }
  .demo-progress { right: 22px; left: 22px; }
  .lookup-card { align-items: flex-start; flex-direction: column; gap: 12px; }
  .demo-loop { overflow: hidden; }
  .demo-loop span { font-size: 0.49rem; }
  .study-steps,
  .privacy-points { grid-template-columns: 1fr; }
  .study-steps li { min-height: auto; }
  .ownership-note { padding: 35px 28px 31px; }
}

@media (prefers-reduced-motion: reduce) {
  .workspace-demo { animation: none; }
}