/* =========================================================
   PERFORMANCE PROJECTS
   Vehicle Performance Modelling Suite
========================================================= */

:root {
  --perf-accent: #8a3038;
  --perf-text: #111111;
  --perf-muted: #6d6d6d;
  --perf-rule: #dedede;
  --perf-soft: #fafafa;
  --perf-white: #ffffff;
  --perf-max: 1280px;
}

.performance-detail-page {
  background: var(--perf-white);
  color: var(--perf-text);
}

.performance-project {
  width: min(var(--perf-max), calc(100% - 80px));
  margin: 0 auto;
  font-family: Helvetica, Arial, sans-serif;
}

/* HERO */

.project-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(48px, 7vw, 96px);
  align-items: center;
  min-height: 720px;
  padding: 72px 0 88px;
}

.project-kicker,
.section-kicker,
.eyebrow,
.results-heading p {
  margin: 0;
  color: var(--perf-accent);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.project-hero h1 {
  margin: 14px 0 20px;
  font-size: clamp(52px, 6.6vw, 92px);
  line-height: 0.96;
  font-weight: 300;
  letter-spacing: -0.045em;
}

.project-title-line {
  width: 76px;
  height: 2px;
  margin: 0 0 28px;
  background: var(--perf-accent);
}

.project-lead {
  max-width: 620px;
  margin: 0;
  color: #4b4b4b;
  font-size: 16px;
  line-height: 1.8;
}

.project-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 32px;
}

.project-link {
  display: inline-block;
  color: var(--perf-text);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.11em;
  text-decoration: none;
  text-transform: uppercase;
  border-bottom: 1px solid var(--perf-text);
  padding-bottom: 5px;
}

.project-link:hover {
  color: var(--perf-accent);
  border-color: var(--perf-accent);
}

.project-link-muted {
  color: var(--perf-muted);
  border-color: #cfcfcf;
}

.hero-media {
  margin: 0;
}

.hero-media img {
  display: block;
  width: 100%;
  max-height: 620px;
  object-fit: contain;
  background: transparent;
}

/* SECTIONS */

.performance-section {
  padding: 96px 0;
  scroll-margin-top: 110px;
}

.performance-section-tint {
  position: relative;
}

.performance-section-tint::before {
  content: "";
  position: absolute;
  inset: 0 calc(50% - 50vw);
  z-index: -1;
  background: var(--perf-soft);
}

.section-heading {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 18px;
  align-items: start;
  margin-bottom: 48px;
}

.section-index {
  margin: 2px 0 0;
  color: var(--perf-accent);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.section-heading h2 {
  margin: 8px 0 0;
  font-size: clamp(34px, 4vw, 58px);
  line-height: 1;
  font-weight: 300;
  letter-spacing: -0.035em;
}

.section-subtitle {
  margin: 14px 0 0;
  color: #777;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* QUESTIONS / NOTES */

.question-strip {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 28px;
  padding: 22px 0;
  margin-bottom: 56px;
  border-top: 1px solid var(--perf-rule);
  border-bottom: 1px solid var(--perf-rule);
}

.question-strip span,
.note-label,
.equation-card span,
.equation-inline span,
.concept-panel span {
  color: var(--perf-accent);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.question-strip p {
  max-width: 850px;
  margin: 0;
  font-size: 18px;
  line-height: 1.55;
}

/* SUITE OVERVIEW */

.suite-map {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--perf-rule);
  border: 1px solid var(--perf-rule);
}

.suite-card {
  min-height: 185px;
  padding: 28px;
  background: var(--perf-white);
  cursor: default;
  transition: transform 180ms ease, background 180ms ease;
}

.suite-card.is-complete {
  cursor: pointer;
}

.suite-card.is-complete:hover {
  background: #fdfdfd;
  
}

.suite-card.is-active {
  box-shadow: inset 0 2px 0 var(--perf-accent);
}

.suite-card span {
  display: block;
  margin-bottom: 32px;
  color: var(--perf-accent);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.suite-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 500;
}

.suite-card p {
  margin: 0;
  color: var(--perf-muted);
  font-size: 12px;
}

.suite-card.is-development {
  background: #f5f5f5;
}

.suite-card.is-development h3,
.suite-card.is-development p {
  color: #929292;
}

.suite-flow,
.mini-flow,
.cause-chain {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 34px;
}

.suite-flow span,
.mini-flow span,
.cause-chain span {
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.suite-flow i,
.mini-flow b,
.cause-chain b {
  color: var(--perf-accent);
  font-size: 14px;
  font-style: normal;
  font-weight: 400;
}

/* CONTENT LAYOUTS */

.content-split {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(42px, 6vw, 84px);
  align-items: center;
  margin: 64px 0;
}

.content-split-reverse {
  grid-template-columns: minmax(0, 1.28fr) minmax(260px, 0.72fr);
}

.content-copy {
  max-width: 430px;
}

.content-copy h3,
.results-heading h3 {
  margin: 0 0 18px;
  font-size: 28px;
  line-height: 1.12;
  font-weight: 400;
}

.content-copy p {
  margin: 0 0 18px;
  color: #525252;
  font-size: 13px;
  line-height: 1.8;
}

.process-list {
  margin-top: 28px;
  border-top: 1px solid var(--perf-rule);
}

.process-list div {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--perf-rule);
}

.process-list span {
  color: var(--perf-accent);
  font-size: 10px;
}

.process-list p {
  margin: 0;
  font-size: 11px;
  line-height: 1.55;
}

code {
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.94em;
}

/* MEDIA */

.media-card {
  margin: 0;
  min-width: 0;
}

.media-card img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 620px;
  object-fit: contain;
  background: transparent;
  border: none;
  box-shadow: none;
}

.media-card-large img {
  max-height: 720px;
}

.media-card figcaption {
  margin-top: 10px;
  color: #7a7a7a;
  font-size: 9px;
  line-height: 1.4;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 36px;
  align-items: start;
}

.compact-comparison {
  margin-top: 36px;
}

.triple-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.result-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(220px, 0.5fr);
  gap: 42px;
  align-items: stretch;
}

.result-feature {
  align-items: start;
}

/* RESULTS */

.results-heading {
  margin: 84px 0 36px;
}

.results-heading h3 {
  margin-top: 8px;
}

.metric-column,
.metric-grid {
  display: grid;
  gap: 1px;
  background: var(--perf-rule);
  border: 1px solid var(--perf-rule);
}

.metric-column {
  grid-template-columns: 1fr;
}

.metric-grid-four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 36px;
}

.metric-card {
  padding: 24px;
  background: var(--perf-white);
}

.metric-card strong {
  display: block;
  margin-bottom: 12px;
  color: var(--perf-text);
  font-size: 28px;
  font-weight: 400;
}

.metric-card span {
  color: var(--perf-muted);
  font-size: 10px;
  line-height: 1.55;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.engineering-note {
  margin-top: 44px;
  padding: 28px 0 0;
  border-top: 1px solid var(--perf-rule);
}

.engineering-note p {
  max-width: 900px;
  margin: 0 0 10px;
  color: #4d4d4d;
  font-size: 13px;
  line-height: 1.75;
}

.engineering-note .note-label {
  color: var(--perf-accent);
  font-size: 10px;
}

.note-value {
  color: var(--perf-text) !important;
  font-size: 26px !important;
  line-height: 1.1 !important;
  font-weight: 400;
}

.engineering-note-accent {
  border-top: 2px solid var(--perf-accent);
}

/* EQUATIONS / DATA */

.equation-card,
.equation-inline {
  border-left: 2px solid var(--perf-accent);
  padding-left: 20px;
}

.equation-card {
  margin: 36px 0 0;
}

.equation-card p {
  margin: 10px 0 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 21px;
}

.equation-inline {
  margin-top: 28px;
}

.equation-inline strong {
  display: block;
  margin-top: 8px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 24px;
  font-weight: 400;
}

.data-pair,
.parameter-strip {
  display: grid;
  gap: 1px;
  background: var(--perf-rule);
  border: 1px solid var(--perf-rule);
}

.data-pair {
  grid-template-columns: repeat(2, 1fr);
  margin-top: 28px;
}

.data-pair div,
.parameter-strip div {
  background: var(--perf-white);
}

.data-pair div {
  padding: 18px;
}

.data-pair span,
.parameter-strip span {
  display: block;
  margin-bottom: 6px;
  color: var(--perf-muted);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.data-pair strong,
.parameter-strip strong {
  font-size: 16px;
  font-weight: 400;
}

.parameter-strip {
  grid-template-columns: repeat(5, 1fr);
  margin: 52px 0;
}

.parameter-strip div {
  padding: 18px;
}

/* CONCEPT / CASE STUDY */

.concept-panel {
  padding: 34px;
  background: var(--perf-soft);
  border-left: 2px solid var(--perf-accent);
}

.concept-panel p {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.6;
}

.case-study-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--perf-rule);
  border: 1px solid var(--perf-rule);
}

.case-study-card {
  padding: 32px;
  background: var(--perf-white);
}

.case-study-card-wide {
  grid-column: 1 / -1;
}

.case-study-card > span {
  color: var(--perf-accent);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.case-study-card h4 {
  margin: 10px 0 18px;
  font-size: 24px;
  font-weight: 400;
}

.case-study-card strong {
  display: block;
  margin-bottom: 6px;
  font-size: 44px;
  font-weight: 300;
}

.case-study-card p {
  margin: 0 0 8px;
  color: var(--perf-muted);
  font-size: 12px;
  line-height: 1.65;
}

.case-study-card small {
  color: #8a8a8a;
  font-size: 10px;
}

.logic-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--perf-rule);
  border: 1px solid var(--perf-rule);
}

.logic-card div {
  padding: 28px;
  background: var(--perf-white);
}

.logic-card span {
  display: block;
  color: var(--perf-accent);
  font-size: 10px;
  letter-spacing: 0.1em;
}

.logic-card strong {
  display: block;
  margin: 18px 0 10px;
  font-size: 20px;
  font-weight: 400;
}

.logic-card p {
  margin: 0;
  color: var(--perf-muted);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.vertical-flow {
  justify-content: flex-start;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

/* DEVELOPMENT */

.development-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
}

.development-card {
  padding: 36px;
  min-height: 250px;
  border-top: 1px solid #bdbdbd;
  background: var(--perf-soft);
}

.development-status {
  color: var(--perf-accent);
  font-size: 9px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.development-card h3 {
  margin: 38px 0 14px;
  font-size: 24px;
  font-weight: 400;
}

.development-card p {
  max-width: 460px;
  margin: 0;
  color: var(--perf-muted);
  font-size: 13px;
  line-height: 1.7;
}

.development-line {
  width: 45px;
  height: 2px;
  margin: 30px 0 14px;
  background: var(--perf-accent);
}

.development-card small {
  color: #868686;
  font-size: 9px;
  letter-spacing: 0.1em;
}

/* CLOSE */

.project-close {
  padding: 80px 0 110px;
  text-align: center;
}

.project-close > p {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.project-close > div {
  width: 45px;
  height: 2px;
  margin: 20px auto;
  background: var(--perf-accent);
}

.project-close > span {
  display: block;
  max-width: 620px;
  margin: 0 auto;
  color: var(--perf-muted);
  font-size: 12px;
  line-height: 1.8;
}

.project-link-centre {
  margin-top: 28px;
}

/* =========================================================
   REVEAL
   Content is visible by default.
   Animation only applies when JavaScript is active.
========================================================= */

.reveal {
  opacity: 1;
  transform: translateY(0);
}

.js-enabled .reveal {
  opacity: 0;
  transform: translateY(6px);
  transition:
    opacity 550ms ease,
    transform 550ms ease;
}

.js-enabled .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* RESPONSIVE */

@media (max-width: 1100px) {
  .project-hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-media {
    max-width: 900px;
  }

  .suite-map {
    grid-template-columns: repeat(2, 1fr);
  }

  .content-split,
  .content-split-reverse,
  .result-layout {
    grid-template-columns: 1fr;
  }

  .content-copy {
    max-width: 700px;
  }

  .triple-grid {
    grid-template-columns: 1fr;
  }

  .parameter-strip {
    grid-template-columns: repeat(3, 1fr);
  }

  .metric-grid-four {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 800px) {
  .performance-project {
    width: min(100% - 40px, var(--perf-max));
  }

  .project-hero {
    padding: 56px 0 64px;
  }

  .project-hero h1 {
    font-size: clamp(42px, 11vw, 66px);
  }

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

  .section-heading {
    grid-template-columns: 34px 1fr;
  }

  .question-strip {
    grid-template-columns: 1fr;
  }

  .comparison-grid,
  .development-grid,
  .case-study-grid,
  .logic-card {
    grid-template-columns: 1fr;
  }

  .case-study-card-wide {
    grid-column: auto;
  }

  .parameter-strip {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .performance-project {
    width: calc(100% - 32px);
  }

  .project-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .suite-map,
  .parameter-strip,
  .metric-grid-four,
  .data-pair {
    grid-template-columns: 1fr;
  }

  .suite-flow,
  .mini-flow,
  .cause-chain {
    justify-content: flex-start;
  }

  .content-split {
    gap: 32px;
    margin: 48px 0;
  }
}


/* =========================================================
   AERODYNAMIC BRAKING CASE STUDY
========================================================= */

.case-study-intro {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
  margin-bottom: 52px;
}

.aero-config-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--perf-rule);
  border: 1px solid var(--perf-rule);
}

.aero-config-grid div {
  padding: 28px;
  background: var(--perf-white);
}

.aero-config-grid span {
  display: block;
  margin-bottom: 22px;
  color: var(--perf-accent);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.aero-config-grid strong {
  display: block;
  margin: 6px 0;
  font-size: 20px;
  font-weight: 400;
}

.equation-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  margin-bottom: 72px;
}

.equation-pair .equation-card {
  margin: 0;
}

.compact-results-heading {
  margin-top: 64px;
}

.case-study-result-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(240px, 0.55fr);
  gap: 42px;
  align-items: stretch;
}

.case-study-result-layout .metric-column {
  height: 100%;
}

.metric-card-accent {
  box-shadow: inset 0 2px 0 var(--perf-accent);
}

.comparison-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 48px;
  background: var(--perf-rule);
  border: 1px solid var(--perf-rule);
}

.comparison-summary > div {
  padding: 28px;
  background: var(--perf-white);
}

.comparison-summary span {
  display: block;
  margin-bottom: 14px;
  color: var(--perf-accent);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.comparison-summary strong {
  display: block;
  margin-bottom: 8px;
  font-size: 30px;
  font-weight: 300;
}

.comparison-summary p {
  margin: 0;
  color: var(--perf-muted);
  font-size: 11px;
  line-height: 1.55;
}

@media (max-width: 1000px) {
  .case-study-intro,
  .case-study-result-layout {
    grid-template-columns: 1fr;
  }

  .comparison-summary {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .aero-config-grid,
  .equation-pair {
    grid-template-columns: 1fr;
  }
}

/* =========================================================
     PROJECT NAVIGATION
  ========================================================= */
  
  .project-nav {
    display: flex;
  
    justify-content:
      space-between;
  
    align-items: center;
  
    gap: 32px;
  
    padding:
      32px
      0
      56px;
  
    border-top:
      1px
      solid
      var(--line);
  }
  
  
  .project-nav a {
    font-size: 9px;
  
    letter-spacing: 2px;
  
    color: #555;
  
    text-decoration: none;
  }
  
  
  .project-nav a:hover {
    color:
      var(--accent);
  }

/* =========================================================
   SHARED ACCESSIBILITY / MOTION REFINEMENTS
========================================================= */

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent, #8a3038);
  outline-offset: 5px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}