/* ============================================================
   Squares & Squiggles — NFT Collection Site
   style.css
   ============================================================ */

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

:root {
  --col-bg:        #0d0d0d;
  --col-surface:   #181818;
  --col-border:    #2a2a2a;
  --col-text:      #f0f0f0;
  --col-muted:     #888;
  --col-accent-1:  #df4e7b;  /* banner vivid pink      */
  --col-accent-2:  #f4df3a;  /* banner warm yellow     */
  --col-accent-3:  #28bfbe;  /* banner teal            */
  --col-accent-4:  #7248c8;  /* banner purple          */
  --col-accent-5:  #f06830;  /* banner orange          */
  --font-sans:     'Barlow', sans-serif;
  --font-cond:     'Barlow Condensed', sans-serif;
  --font-mono:     'Space Mono', monospace;
  --radius:        10px;
  --max-w:         1280px;
  --nav-h:         64px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--col-bg);
  color: var(--col-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ---------- Utility ---------- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 16px;
}

.section-title.centered { text-align: center; }

.section-subtitle {
  font-size: 1.05rem;
  color: var(--col-muted);
  margin-bottom: 48px;
}
.section-subtitle.centered { text-align: center; }

.amp {
  color: var(--col-accent-1);
  font-style: italic;
}

/* ---------- Nav ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  background: rgba(13,13,13,0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--col-border);
  z-index: 100;
}

.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
  position: relative;
}

.nav-logo-amp {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-cond);
  font-style: italic;
  font-weight: 800;
  font-size: 1.8rem;
  color: var(--col-accent-1);
  text-shadow: 0 1px 6px rgba(0,0,0,0.65);
  pointer-events: none;
  line-height: 1;
}

.nav-logo-img {
  height: 42px;
  width: 42px;
  object-fit: cover;
  border-radius: 6px;
  display: block;
  border: 2px solid var(--col-accent-1);  /* hot pink border */
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 32px;
}

.nav-links a {
  text-decoration: none;
  color: var(--col-muted);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--col-text); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  width: 100%;
  margin-top: var(--nav-h);
  overflow: hidden;
}

/* Full image — no cropping, natural aspect ratio */
.hero picture {
  display: block;
  width: 100%;
  line-height: 0;
}

.hero-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: unset;
}

.hero-overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  z-index: 2;
  padding: 64px 40px;
  background: linear-gradient(to top, rgba(13,13,13,0.92) 0%, rgba(13,13,13,0.4) 55%, transparent 100%);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.hero-title {
  font-family: var(--font-cond);
  font-size: clamp(3rem, 9vw, 7.5rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: #fff;
  text-shadow: 0 2px 24px rgba(0,0,0,0.6);
}

/* "Squares" and "Squiggles" in turquoise; "&" stays pink via .amp */
.hero-title .word {
  color: var(--col-accent-3);  /* #4fcbff turquoise */
}

.hero-byline {
  font-family: var(--font-cond);
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--col-accent-2);
  text-shadow: 0 1px 8px rgba(0,0,0,0.7);
  margin-top: -8px;  /* tuck under title */
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: rgba(255,255,255,0.8);
  max-width: 520px;
  text-shadow: 0 1px 8px rgba(0,0,0,0.8);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 50px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--col-accent-1);
  color: #0d0d0d;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(255, 79, 203, 0.45);
}

/* ---------- About ---------- */
.about { background: var(--col-surface); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-text {
  max-width: 760px;
}

.about-text p {
  color: rgba(240,240,240,0.8);
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.about-text p:last-child { margin-bottom: 0; }

.about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn-link {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 50px;
  border: 1px solid var(--col-border);
  background: transparent;
  color: var(--col-text);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: border-color 0.2s, color 0.2s, transform 0.15s;
}

.btn-link:hover {
  border-color: var(--col-accent-3);
  color: var(--col-accent-3);
  transform: translateY(-2px);
}

.btn-link-primary {
  background: var(--col-accent-1);
  border-color: var(--col-accent-1);
  color: #0d0d0d;
}

.btn-link-primary:hover {
  background: transparent;
  border-color: var(--col-accent-1);
  color: var(--col-accent-1);
  transform: translateY(-2px);
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.stat-card {
  background: var(--col-bg);
  border: 1px solid var(--col-border);
  border-radius: var(--radius);
  padding: 28px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 0.2s, transform 0.2s;
}

.stat-card:hover {
  border-color: var(--col-accent-2);
  transform: translateY(-3px);
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--col-accent-2);
  line-height: 1;
}

.stat-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--col-muted);
}

/* ---------- Gallery ---------- */
.gallery-section { background: var(--col-bg); }

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}

.gallery-item {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--col-border);
  cursor: pointer;
  background: var(--col-surface);
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.gallery-item:hover {
  transform: translateY(-4px) scale(1.02);
  border-color: var(--col-accent-3);
  box-shadow: 0 12px 36px rgba(79, 203, 255, 0.2);
  z-index: 2;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: opacity 0.3s;
}

.gallery-item .item-label {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 6px 10px;
  background: linear-gradient(transparent, rgba(0,0,0,0.75));
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: rgba(255,255,255,0.8);
  opacity: 0;
  transition: opacity 0.2s;
}

.gallery-item:hover .item-label { opacity: 1; }

/* Placeholder tile when image not yet uploaded */
.gallery-item.placeholder {
  background: var(--col-surface);
  display: flex;
  align-items: center;
  justify-content: center;
}

.gallery-item.placeholder::before {
  content: attr(data-num);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--col-border);
}

/* ---------- Process / Source ---------- */
.process { background: var(--col-surface); }

/* 4-layer flow row */
.layers {
  display: flex;
  align-items: stretch;   /* equal height cards */
  gap: 0;
  margin: 40px 0 64px;
  flex-wrap: wrap;
}

.layer-step {
  flex: 1 1 160px;
  padding: 28px 24px;
  background: var(--col-bg);
  border: 1px solid var(--col-border);
  border-radius: var(--radius);
  min-width: 140px;
}

.layer-arrow {
  display: flex;
  align-items: center;   /* arrow stays vertically centred */
  justify-content: center;
  padding: 0 12px;
  font-size: 1.5rem;
  color: var(--col-border);
  flex-shrink: 0;
}

.layer-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--col-accent-1);   /* default — overridden per step */
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

/* Per-step accent colors */
.step-1 { border-left: 3px solid var(--col-accent-1); }
.step-2 { border-left: 3px solid var(--col-accent-2); }
.step-3 { border-left: 3px solid var(--col-accent-3); }
.step-4 { border-left: 3px solid var(--col-accent-5); }

.step-2 .layer-num { color: var(--col-accent-2); }
.step-3 .layer-num { color: var(--col-accent-3); }
.step-4 .layer-num { color: var(--col-accent-5); }

.layer-title {
  font-family: var(--font-cond);
  font-size: 1.4rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--col-text);
  margin-bottom: 10px;
}

.layer-desc {
  font-size: 0.9rem;
  color: rgba(240,240,240,0.65);
  line-height: 1.55;
}

@media (max-width: 700px) {
  .layers { flex-direction: column; gap: 12px; }
  .layer-arrow { transform: rotate(90deg); align-self: flex-start; padding: 4px 28px; }
}

.source-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--col-muted);
  margin-bottom: 16px;
}

/* Source image grid — 2×2 */
.source-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  max-width: 760px;
}

.source-item {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--col-border);
  background: var(--col-bg);
  transition: border-color 0.2s, transform 0.2s;
}

.source-item:hover {
  border-color: var(--col-accent-5);
  transform: translateY(-3px);
}

.source-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Empty state shown when no source images added yet */
.source-empty {
  color: var(--col-border);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 24px 0;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--col-bg);
  border-top: 1px solid var(--col-border);
  padding: 32px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-logo {
  font-family: var(--font-cond);
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--col-text);
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--col-muted);
}

/* ---------- Lightbox ---------- */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  z-index: 200;
  align-items: center;
  justify-content: center;
  gap: 0;
}

.lightbox.active { display: flex; }

.lightbox-content {
  position: relative;
  max-width: min(90vw, 900px);
  max-height: 90svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.lightbox-img {
  max-width: 100%;
  max-height: 80svh;
  object-fit: contain;
  border-radius: var(--radius);
  box-shadow: 0 24px 80px rgba(0,0,0,0.7);
}

.lightbox-caption {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--col-muted);
  text-align: center;
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--col-border);
  color: var(--col-text);
  cursor: pointer;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, transform 0.15s;
  flex-shrink: 0;
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
  background: rgba(255,255,255,0.18);
  transform: scale(1.1);
}

.lightbox-close {
  position: absolute;
  top: 16px; right: 16px;
  z-index: 210;
}

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-prev { left: 16px; }
.lightbox-next { right: 16px; }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--col-bg); }
::-webkit-scrollbar-thumb { background: var(--col-border); border-radius: 3px; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 600px) {
  .nav { padding: 0 16px; }
  .nav-links { gap: 16px; }
  .hero-overlay { padding: 40px 20px; }
  .gallery-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 8px; }
  .section { padding: 56px 0; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .lightbox-prev { left: 4px; }
  .lightbox-next { right: 4px; }
}