/* ============================================================
   BICYCLIOUS — Technical Impressionism Design System
   Mapped from DESIGN.md / "Technical Impressionism" spec
   ============================================================ */

/* ── Fonts ──────────────────────────────────────────────────── */
@font-face {
  font-family: 'Cooper';
  src: url('/fonts/Cooper-Black.ttf') format('truetype');
  font-weight: 900;
  font-style: normal;
  font-display: swap;
}

/* ── Custom Properties ─────────────────────────────────────── */
:root {
  /* Color tokens */
  --surface:                   #fbf9f5;
  --surface-dim:               #dbdad6;
  --surface-container-lowest:  #ffffff;
  --surface-container-low:     #f5f3ef;
  --surface-container:         #efeeea;
  --surface-container-high:    #eae8e4;
  --surface-container-highest: #e4e2de;
  --on-surface:                #1b1c1a;
  --on-surface-variant:        #46474a;
  --inverse-surface:           #30312e;
  --inverse-on-surface:        #f2f0ed;
  --outline:                   #76777b;
  --outline-variant:           #c7c6ca;
  --secondary:                 #326193;
  --on-secondary-container:    #225384;
  --background:                #fbf9f5;
  --on-background:             #1b1c1a;

  /* Semantic aliases */
  --vintage-paper:  #fbf9f5;
  --india-ink:      #1b1c1a;
  --technical-blue: #326193;

  /* Typography */
  --font: 'Space Grotesk', system-ui, sans-serif;
  --font-display: 'Cooper', 'Space Grotesk', system-ui, sans-serif;

  /* Spacing */
  --unit:      4px;
  --gutter:    24px;
  --margin:    32px;
  --hairline:  1px solid var(--india-ink);
  --fine-line: 0.5px solid var(--india-ink);

  /* Cross-hatch pattern: 45° lines, 4px spacing, India Ink */
  --hatch: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8'%3E%3Cline x1='0' y1='8' x2='8' y2='0' stroke='%231b1c1a' stroke-width='0.5'/%3E%3C/svg%3E");

  /* Layout */
  --max-width: 1100px;
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html { scroll-behavior: smooth; }

body {
  background: var(--background);
  color: var(--on-background);
  font-family: var(--font);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }

/* ── Layout Wrapper ─────────────────────────────────────────── */
.header-inner,
.footer-inner,
.hero-text,
.builds-grid,
.posts-preview,
.posts-section,
.blog-post,
.build-page {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--margin);
  padding-right: var(--margin);
}

/* ── Site Header ────────────────────────────────────────────── */
.site-header {
  background: var(--surface-container-lowest);
  border-bottom: var(--hairline);
}

/* Masthead — large wordmark row */
.site-masthead {
  background: #D20A6A;
  border-bottom: var(--hairline);
  padding: 0;
  text-align: center;
  line-height: 0;
}

.site-logo { display: inline-block; text-decoration: none; }

.logo-img {
  width: 700px;
  max-width: 100%;
  height: auto;
  display: block;
}

.logo-bracket {
  font-size: 20px;
  font-weight: 700;
  color: var(--india-ink);
}

.logo-text {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--india-ink);
}

/* Nav bar — tagline + links row */
.site-nav-bar {
  background: var(--surface-container-lowest);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 10px var(--margin);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gutter);
}

.site-tagline {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}

.site-nav {
  display: flex;
  gap: var(--gutter);
  align-items: center;
}

.site-nav a {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--india-ink);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.1s;
}

.site-nav a:hover,
.site-nav a.nav-active {
  border-bottom-color: var(--india-ink);
}

/* ── Hero ───────────────────────────────────────────────────── */
.hero {}

.hero-text {
  padding-top: calc(var(--margin) * 2);
  padding-bottom: calc(var(--margin) * 2);
}

.hero-grid-lines { display: none; }

.hero-title {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--india-ink);
}

.hero-sub {
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--on-surface-variant);
  margin-top: 16px;
}

.hero-ctas {
  display: flex;
  gap: var(--gutter);
  margin-top: var(--margin);
  flex-wrap: wrap;
}

/* ── Buttons ────────────────────────────────────────────────── */
.btn-retro,
.btn-retro.btn-secondary,
.btn-retro.btn-small,
.btn-retro.btn-buy {
  display: inline-block;
  font-family: var(--font);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 10px 20px;
  border: var(--hairline);
  background: var(--india-ink);
  color: var(--vintage-paper);
  cursor: pointer;
  border-radius: 0;
  transition: background-image 0.1s;
}

.btn-retro:hover,
.btn-retro.btn-buy:hover {
  background-image: none;
  background-color: var(--on-surface-variant);
}

.btn-retro.btn-secondary {
  background: transparent;
  color: var(--india-ink);
}

.btn-retro.btn-secondary:hover {
  background-image: var(--hatch);
  background-color: transparent;
  color: var(--india-ink);
}

.btn-retro.btn-small {
  font-size: 10px;
  padding: 7px 14px;
}

.btn-retro[disabled],
.btn-retro.disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* ── Section Header Row (homepage) ─────────────────────────── */
.section-header-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--gutter);
  padding-bottom: 12px;
  margin-bottom: var(--gutter);
  border-bottom: var(--hairline);
}

.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--india-ink);
}

.section-more {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--technical-blue);
  border-bottom: 0.5px solid transparent;
  transition: border-color 0.1s;
}

.section-more:hover { border-bottom-color: var(--technical-blue); }

/* ── Section Header (list pages) ───────────────────────────── */
.section-header {
  border-bottom: var(--hairline);
  padding-bottom: 16px;
  margin-bottom: var(--margin);
}

.section-title {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--india-ink);
}

.section-sub {
  font-size: 13px;
  font-weight: 500;
  font-style: italic;
  color: var(--technical-blue);
  margin-top: 8px;
}

/* ── Homepage Sections ──────────────────────────────────────── */
.builds-grid,
.posts-preview {
  padding-top: calc(var(--margin) * 1.5);
  padding-bottom: calc(var(--margin) * 1.5);
  border-bottom: var(--hairline);
}

/* ── Card Grid ───────────────────────────────────────────────── */
.card-grid {
  margin-top: var(--gutter);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--gutter);
  background: var(--surface);
}

.card-grid--sold { opacity: 0.6; }

/* ── Bike Card ───────────────────────────────────────────────── */
.bike-card {
  background: var(--surface);
  display: flex;
  flex-direction: column;
  border-radius: 10px;
  overflow: hidden;
}

.card-link {
  display: flex;
  flex-direction: column;
  flex: 1;
  text-decoration: none;
  color: inherit;
}

.card-img-wrap {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--surface-container);
}

.card-no-img {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--outline);
}

.card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
  filter: grayscale(15%);
}

.bike-card:hover .card-img-wrap img { transform: scale(1.04); }


.card-img-overlay { display: none; }

.card-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 3px 8px;
  border: var(--hairline);
  background: var(--vintage-paper);
  color: var(--india-ink);
}

.card-badge--available {
  border-color: var(--technical-blue);
  color: var(--technical-blue);
  background: var(--surface-container-lowest);
}

.card-badge--sold {
  color: var(--outline);
  border-color: var(--outline);
}

.card-body {
  padding: 20px var(--gutter);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: #c9a8b0;
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--india-ink);
}

.card-spec {
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--on-surface-variant);
  font-style: italic;
}

.card-footer {
  margin-top: auto;
  padding-top: 12px;
  border-top: 0.5px solid var(--outline-variant);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-price {
  font-size: 16px;
  font-weight: 600;
  color: var(--india-ink);
}

.card-cta {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--technical-blue);
}

/* ── Sold Divider ───────────────────────────────────────────── */
.sold-divider {
  padding: var(--margin) 0 var(--gutter);
  border-top: var(--hairline);
  margin-top: var(--margin);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}

/* ── Posts List ─────────────────────────────────────────────── */
.posts-section { padding: calc(var(--margin) * 1.5) 0; }

.post-list { display: flex; flex-direction: column; }

.post-row {
  border-bottom: 0.5px solid var(--outline-variant);
}

.post-row:first-child { border-top: 0.5px solid var(--outline-variant); }

.post-row-link {
  display: grid;
  grid-template-columns: 96px 1fr auto;
  grid-template-rows: auto auto auto;
  column-gap: var(--gutter);
  padding: var(--gutter) 0;
  text-decoration: none;
  color: inherit;
  transition: background-image 0.1s;
}

.post-row-link:hover { background-image: var(--hatch); }

/* Full-width variant on list page */
.post-row--full .post-row-link {
  grid-template-columns: 96px 1fr;
}

.post-row-date {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  padding-top: 5px;
  grid-row: 1;
}

.post-row-title {
  font-size: 24px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--india-ink);
  grid-column: 2;
  grid-row: 1;
}

.post-row-summary {
  font-size: 16px;
  line-height: 1.5;
  color: var(--on-surface-variant);
  grid-column: 2;
  grid-row: 2;
  margin-top: 4px;
}

.post-row-header {
  display: flex;
  align-items: center;
  gap: 16px;
  grid-column: 2;
  grid-row: 1;
}

.post-row-header .post-row-date { padding-top: 0; }

.post-row-header ~ .post-row-title { grid-row: 2; }
.post-row-header ~ .post-row-summary { grid-row: 3; }

.post-row-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.post-row-cta {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--technical-blue);
  align-self: start;
  padding-top: 5px;
  grid-column: 3;
  grid-row: 1;
}

.tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 2px 7px;
  border: 0.5px solid var(--outline);
  color: var(--on-surface-variant);
}

/* ── Back Link ──────────────────────────────────────────────── */
.back-link {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--on-surface-variant);
  border-bottom: 0.5px solid transparent;
  margin-bottom: var(--margin);
  transition: color 0.1s, border-color 0.1s;
}

.back-link:hover {
  color: var(--india-ink);
  border-bottom-color: var(--india-ink);
}

/* ── Post Header ────────────────────────────────────────────── */
.blog-post,
.build-page { padding-top: var(--margin); padding-bottom: var(--margin); }

.post-header {
  border-bottom: var(--hairline);
  padding-bottom: var(--gutter);
  margin-bottom: var(--margin);
}

.post-title {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--india-ink);
}

.post-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--gutter);
}

.post-specs {
  font-size: 14px;
  font-weight: 500;
  font-style: italic;
  color: var(--on-surface-variant);
  margin-top: 8px;
}

.post-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--gutter);
  margin-top: 16px;
}

.post-date {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.post-year {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}

.post-price {
  font-size: 20px;
  font-weight: 600;
  color: var(--india-ink);
}

/* ── Status Badges ──────────────────────────────────────────── */
.status-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 10px;
  border: var(--hairline);
  flex-shrink: 0;
}

.status-badge--available {
  border-color: var(--technical-blue);
  color: var(--technical-blue);
}

.status-badge--sold {
  border-color: var(--outline);
  color: var(--outline);
}

/* ── Post Hero Image ────────────────────────────────────────── */
.post-hero-img {
  margin-bottom: var(--margin);
  border: var(--hairline);
}

.post-hero-img img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: grayscale(10%);
}

/* ── Post Body (Markdown) ───────────────────────────────────── */
.post-body {
  font-size: 18px;
  line-height: 1.6;
  max-width: 720px;
}

.post-body h2 {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.2;
  margin-top: 48px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: var(--hairline);
}

.post-body h3 {
  font-size: 24px;
  font-weight: 600;
  line-height: 1.3;
  margin-top: 32px;
  margin-bottom: 12px;
}

.post-body h4 {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  margin-top: 24px;
  margin-bottom: 8px;
}

.post-body p { margin-bottom: 20px; }

.post-body ul,
.post-body ol { margin-left: 24px; margin-bottom: 20px; }

.post-body li { margin-bottom: 6px; }

.post-body blockquote {
  border-left: var(--hairline);
  padding-left: var(--gutter);
  margin: 24px 0;
  font-style: italic;
  color: var(--on-surface-variant);
}

.post-body a {
  color: var(--technical-blue);
  text-underline-offset: 3px;
}

.post-body strong { font-weight: 700; }

.post-body code {
  font-family: var(--font);
  font-size: 14px;
  background: var(--surface-container);
  padding: 1px 5px;
  border: 0.5px solid var(--outline-variant);
}

.post-body pre {
  background: var(--surface-container);
  border: var(--hairline);
  padding: var(--gutter);
  overflow-x: auto;
  margin-bottom: 24px;
}

.post-body pre code { background: none; border: none; padding: 0; }

.post-body hr {
  border: none;
  border-top: var(--hairline);
  margin: 32px 0;
}

.post-body img {
  border: var(--hairline);
  margin: 24px auto;
}

/* ── Post Footer ────────────────────────────────────────────── */
.post-footer {
  display: flex;
  align-items: center;
  gap: var(--gutter);
  margin-top: var(--margin);
  padding-top: var(--gutter);
  border-top: var(--hairline);
  flex-wrap: wrap;
}

.post-footer .back-link { margin-bottom: 0; }

/* ── Gallery ─────────────────────────────────────────────────── */
.gallery { margin-bottom: var(--margin); }

.gallery-hero {
  border: var(--hairline);
  overflow: hidden;
}

.gallery-hero-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  cursor: zoom-in;
  filter: grayscale(10%);
  transition: filter 0.2s;
}

.gallery-hero-img:hover { filter: grayscale(0%); }

.gallery-thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--background);
  border-left: var(--hairline);
}

.thumb-wrap {
  overflow: hidden;
  aspect-ratio: 1;
  border-top: var(--hairline);
  border-right: var(--hairline);
}

.gallery-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  cursor: zoom-in;
  filter: grayscale(25%);
  transition: filter 0.2s, transform 0.25s;
}

.gallery-thumb:hover { filter: grayscale(0%); transform: scale(1.05); }

/* ── Lightbox ─────────────────────────────────────────────────── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--india-ink);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8'%3E%3Cline x1='0' y1='8' x2='8' y2='0' stroke='%2346474a' stroke-width='0.5'/%3E%3C/svg%3E");
  align-items: center;
  justify-content: center;
}

.lightbox.open { display: flex; }

#lightbox-img {
  max-width: calc(100vw - 80px);
  max-height: calc(100vh - 80px);
  object-fit: contain;
  border: var(--hairline);
  border-color: var(--outline);
}

.lightbox-close {
  position: fixed;
  top: var(--margin);
  right: var(--margin);
  font-family: var(--font);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--inverse-on-surface);
  background: transparent;
  border: 1px solid var(--outline);
  cursor: pointer;
  padding: 8px 16px;
}

.lightbox-close:hover { background: var(--outline); }

/* ── Carousel ───────────────────────────────────────────────── */
.bike-carousel {
  width: 100%;
  padding-bottom: 40px;
}

.bike-carousel {
  touch-action: pan-y;
}

.bike-carousel .swiper-slide {
  border-radius: 10px;
  position: relative;
  cursor: pointer;
}

.carousel-slide-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
  border-radius: 10px;
}

.carousel-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px 16px;
  background: linear-gradient(to top, rgba(27,28,26,0.75), transparent);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  border-radius: 0 0 10px 10px;
}

.carousel-title {
  font-size: 28px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.02em;
}

.carousel-price {
  font-size: 26px;
  font-weight: 700;
  color: rgba(255,255,255,0.85);
  flex-shrink: 0;
}

.swiper-pagination-bullet {
  background: var(--india-ink);
  opacity: 0.3;
}

.swiper-pagination-bullet-active {
  opacity: 1;
  background: var(--india-ink);
}

/* ── Site Footer ────────────────────────────────────────────── */
.site-footer {
  border-top: var(--hairline);
  padding: var(--margin) 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gutter);
}

.footer-logo {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--india-ink);
}

.footer-copy {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--on-surface-variant);
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 640px) {
  :root {
    --margin: 16px;
    --gutter: 16px;
  }

  .hero-title,
  .post-title,
  .section-title { font-size: 32px; }

  .logo-img { width: 100%; }

  .site-tagline { display: none; }

  .hero-ctas { flex-direction: column; align-items: flex-start; }

  .post-row-link {
    grid-template-columns: 1fr;
    row-gap: 6px;
  }

  .post-row-cta { display: none; }

  .post-row-date { grid-column: 1; }
  .post-row-title { grid-column: 1; }
  .post-row-summary { grid-column: 1; }

  .post-row-header { flex-wrap: wrap; }
  .post-row-header ~ .post-row-title { grid-row: auto; }
  .post-row-header ~ .post-row-summary { grid-row: auto; }

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

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

  .post-title-row { flex-direction: column; }

  .footer-inner { flex-direction: column; align-items: flex-start; gap: 8px; }
}