/* ═══════════════════════════════════════════════════════════
   VibeOverflow — retro Spectrum warmth on light parchment
   ═══════════════════════════════════════════════════════════ */

:root {
  --paper: #FAF8F5;
  --paper-2: #F3EFE7;
  --paper-3: #E8E2D6;
  --ink: #1A1A1A;
  --ink-soft: #3D3A34;
  --ink-muted: #6B6560;
  --orange: #F59E0B;
  --orange-deep: #D97706;
  --cyan: #0EA5A4;
  --cyan-bright: #14B8A6;
  --font-display: 'Press Start 2P', monospace;
  --font-body: 'VT323', monospace;
  --font-ui: 'IBM Plex Sans', system-ui, sans-serif;
  --max: 1100px;
  --header-h: 72px;
  --line-soft: rgba(26, 26, 26, 0.08);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-ui);
  font-size: 1.2rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: var(--cyan); text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:hover { color: var(--orange-deep); }

/* ── Atmosphere ── */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 15% 10%, rgba(245, 158, 11, 0.14), transparent 55%),
    radial-gradient(ellipse 60% 45% at 90% 20%, rgba(14, 165, 164, 0.12), transparent 50%),
    linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 55%, var(--paper-3) 100%);
}

.bg-layer::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.035;
  background-image:
    linear-gradient(var(--ink) 1px, transparent 1px),
    linear-gradient(90deg, var(--ink) 1px, transparent 1px);
  background-size: 8px 8px;
  animation: scan-drift 40s linear infinite;
}

@keyframes scan-drift {
  from { background-position: 0 0, 0 0; }
  to   { background-position: 0 64px, 64px 0; }
}

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--header-h);
  padding: 0 1.75rem;
  background: rgba(250, 248, 245, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-soft);
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: var(--ink);
}

.brand-glyph {
  width: 40px;
  height: 40px;
  image-rendering: pixelated;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.brand-name span { color: var(--orange); }

.header-nav {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.header-nav a {
  font-family: var(--font-body);
  font-size: 1.7rem;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.4rem 0.85rem;
  border-radius: 4px;
}

.header-nav a:hover,
.header-nav a[aria-current="page"] {
  color: var(--ink);
  background: rgba(245, 158, 11, 0.28);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.8rem;
  line-height: 1.4;
  padding: 1.05rem 1.45rem;
  text-decoration: none;
  color: var(--ink);
  border-radius: 4px;
  transition: transform 0.15s ease, filter 0.15s ease;
}

.btn:hover {
  transform: translateY(-2px);
  color: var(--ink);
  filter: brightness(1.05);
}

.btn:active { transform: translateY(1px); }

.btn-primary { background: var(--orange); }
.btn-secondary { background: var(--cyan); color: #fff; }
.btn-secondary:hover { color: #fff; }
.btn-ghost { background: rgba(232, 226, 214, 0.85); }

/* ── Hero ── */
.hero {
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1.5rem, 4vw, 3rem);
}

.hero-inner {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(1.75rem, 4vw, 3.25rem);
  align-items: center;
}

.hero-avatar-wrap {
  position: relative;
  flex-shrink: 0;
  width: clamp(140px, 18vw, 220px);
  animation: fade-rise 0.8s ease both;
}

.hero-avatar-wrap::before {
  content: '';
  position: absolute;
  inset: 8% -6% -8% 8%;
  background: radial-gradient(circle at 40% 40%, rgba(245, 158, 11, 0.28), transparent 65%);
  z-index: -1;
  animation: glow-pulse 5s ease-in-out infinite;
}

.hero-avatar {
  width: 100%;
  height: auto;
  display: block;
  animation: avatar-bob 4.5s ease-in-out infinite;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 38rem;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.8vw, 2.65rem);
  line-height: 1.35;
  margin: 0 0 1.35rem;
  color: var(--ink);
  animation: boot-in 0.6s ease both;
}

.hero-brand .amp { color: var(--orange); }

.hero-headline {
  font-family: var(--font-body);
  font-size: clamp(2.4rem, 5vw, 3.5rem);
  line-height: 1.15;
  margin: 0 0 1.1rem;
  color: var(--ink-soft);
  font-weight: 400;
  animation: boot-in 0.6s ease 0.12s both;
}

.hero-support {
  font-size: 1.25rem;
  color: var(--ink-muted);
  margin: 0 0 2rem;
  max-width: 34rem;
  animation: boot-in 0.6s ease 0.22s both;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.95rem;
  animation: boot-in 0.6s ease 0.32s both;
}

@keyframes boot-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

@keyframes fade-rise {
  from { opacity: 0; transform: scale(0.96); }
  to   { opacity: 1; transform: none; }
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.04); }
}

@keyframes avatar-bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

/* ── Sections ── */
.section {
  padding: clamp(3.5rem, 7vw, 5.5rem) clamp(1.5rem, 4vw, 3rem);
}

.section-inner {
  max-width: var(--max);
  margin: 0 auto;
}

.section-kicker {
  font-family: var(--font-display);
  font-size: 0.72rem;
  color: var(--cyan);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 1.1rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.6vw, 1.55rem);
  line-height: 1.45;
  margin: 0 0 1.1rem;
  max-width: 22ch;
}

.section-sub {
  font-family: var(--font-body);
  font-size: 1.9rem;
  line-height: 1.35;
  color: var(--ink-soft);
  margin: 0 0 2rem;
  max-width: 40rem;
}

.band-paper { background: transparent; }
.band-tint {
  background: linear-gradient(180deg, rgba(232, 226, 214, 0.55), rgba(250, 248, 245, 0.2));
}

/* ── Concept strips ── */
.concept-list {
  display: grid;
  gap: 0.75rem;
}

.concept-row {
  display: grid;
  grid-template-columns: 88px 1fr auto;
  gap: 1.25rem;
  align-items: center;
  padding: 1.4rem 1.5rem;
  text-decoration: none;
  color: inherit;
  background: rgba(250, 248, 245, 0.72);
  border-radius: 8px;
  transition: background 0.15s ease, transform 0.15s ease;
}

.concept-row:hover {
  background: rgba(245, 158, 11, 0.18);
  transform: translateX(4px);
}

.concept-glyph {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--orange-deep);
  letter-spacing: 0.04em;
}

.concept-row h3 {
  font-family: var(--font-body);
  font-size: 2.05rem;
  font-weight: 400;
  margin: 0 0 0.25rem;
  color: var(--ink);
}

.concept-row p {
  margin: 0;
  font-size: 1.1rem;
  color: var(--ink-muted);
}

.concept-go {
  font-family: var(--font-display);
  font-size: 0.7rem;
  color: var(--cyan);
}

/* ── About strip ── */
.about-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2.25rem;
  align-items: center;
}

.about-avatar {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  overflow: hidden;
  background: transparent;
  animation: avatar-bob 4s ease-in-out infinite;
}

.about-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-grid .lede {
  font-family: var(--font-body);
  font-size: 2.05rem;
  line-height: 1.35;
  margin: 0 0 1rem;
  color: var(--ink-soft);
}

.about-grid p {
  margin: 0 0 0.9rem;
  color: var(--ink-muted);
  max-width: 40rem;
  font-size: 1.15rem;
}

/* ── Hangout / terminal panel ── */
.terminal {
  background: #1A1A1A;
  color: #E8E2D6;
  padding: 1.75rem 1.85rem;
  border-radius: 8px;
  box-shadow: 0 12px 32px rgba(14, 165, 164, 0.18);
  font-family: var(--font-body);
  font-size: 1.75rem;
  line-height: 1.4;
}

.terminal .prompt { color: var(--orange); }
.terminal .ok { color: var(--cyan-bright); }
.terminal p { margin: 0 0 0.65rem; }
.terminal p:last-child { margin: 0; }

.cursor-blink::after {
  content: '█';
  margin-left: 2px;
  color: var(--orange);
  animation: blink 1s steps(1) infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ── RiCreate tiles ── */
#ricreate-client {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(3.5rem, 7vw, 5.5rem) clamp(1.5rem, 4vw, 3rem);
}

.ricreate-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.ricreate-tile {
  background: rgba(250, 248, 245, 0.85);
  padding: 1.5rem 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--ink);
  border-radius: 8px;
  transition: transform 0.15s ease, background 0.15s ease;
}

.ricreate-tile:hover {
  background: rgba(14, 165, 164, 0.14);
  transform: translateY(-3px);
  color: var(--ink);
}

.ricreate-tile-icon {
  width: 44px;
  height: 44px;
  background: rgba(245, 158, 11, 0.22);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--orange-deep);
}

.ricreate-tile-name {
  font-family: var(--font-body);
  font-size: 1.85rem;
  font-weight: 400;
}

.ricreate-tile-desc {
  font-size: 1.05rem;
  color: var(--ink-muted);
  line-height: 1.55;
  margin: 0;
}

.ricreate-tile-arrow {
  margin-top: auto;
  font-family: var(--font-display);
  font-size: 0.65rem;
  color: var(--cyan);
}

.ricreate-tiles:empty::after {
  content: 'Feature tiles will appear here once published in RiCreate.';
  display: block;
  grid-column: 1 / -1;
  text-align: center;
  padding: 2.5rem 1.5rem;
  color: var(--ink-muted);
  font-family: var(--font-body);
  font-size: 1.6rem;
  background: rgba(232, 226, 214, 0.45);
  border-radius: 8px;
}

/* ── Page shell / article ── */
.page-main {
  max-width: 780px;
  margin: 0 auto;
  padding: clamp(2.5rem, 5vw, 4rem) clamp(1.5rem, 4vw, 2rem) 4rem;
}

.page-main h1 {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.8vw, 1.7rem);
  line-height: 1.45;
  margin: 0 0 1.25rem;
}

.page-main .meta {
  font-family: var(--font-body);
  font-size: 1.6rem;
  color: var(--ink-muted);
  margin: 0 0 2rem;
}

.page-main h2 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.5;
  margin: 2.5rem 0 1rem;
}

.page-main p,
.page-main li {
  color: var(--ink-soft);
  font-size: 1.2rem;
  line-height: 1.75;
}

.page-main ul { padding-left: 1.25rem; }

.page-main pre,
.page-main code {
  font-family: var(--font-body);
  background: var(--paper-2);
}

.page-main code {
  padding: 0.1rem 0.4rem;
  font-size: 1.3rem;
  border-radius: 4px;
}

.page-main pre {
  padding: 1.15rem;
  overflow-x: auto;
  font-size: 1.45rem;
  border-radius: 8px;
}

.back-link {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
  text-decoration: none;
  color: var(--cyan);
}

.back-link:hover { color: var(--orange-deep); }

/* ── Footer ── */
.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.75rem clamp(1.5rem, 4vw, 3rem);
  border-top: 1px solid var(--line-soft);
  background: var(--paper-2);
  font-family: var(--font-body);
  font-size: 1.5rem;
  color: var(--ink-muted);
}

.site-footer a {
  color: var(--ink-soft);
  text-decoration: none;
}

.site-footer a:hover { color: var(--orange-deep); }

.footer-sep { margin: 0 0.5rem; opacity: 0.5; }

/* ── Learn index grid ── */
.learn-list {
  display: grid;
  gap: 0.75rem;
}

.learn-item {
  display: block;
  padding: 1.55rem 1.5rem;
  text-decoration: none;
  color: inherit;
  background: rgba(250, 248, 245, 0.75);
  border-radius: 8px;
  transition: background 0.15s ease, transform 0.15s ease;
}

.learn-item:hover {
  background: rgba(14, 165, 164, 0.14);
  transform: translateX(4px);
}

.learn-item .tag {
  font-family: var(--font-display);
  font-size: 0.65rem;
  color: var(--orange-deep);
  margin-bottom: 0.55rem;
}

.learn-item h2 {
  font-family: var(--font-body);
  font-size: 2.15rem;
  font-weight: 400;
  margin: 0 0 0.4rem;
  color: var(--ink);
}

.learn-item p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 1.1rem;
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .hero {
    min-height: auto;
    padding-top: 2.5rem;
    padding-bottom: 3rem;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
  }

  .hero-avatar-wrap {
    width: clamp(130px, 36vw, 180px);
  }

  .hero-copy {
    max-width: none;
    align-items: center;
  }

  .hero-support { margin-left: auto; margin-right: auto; }

  .hero-ctas { justify-content: center; }

  .about-grid {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .concept-row {
    grid-template-columns: 64px 1fr;
    text-align: left;
  }

  .concept-go { display: none; }
}

@media (max-width: 600px) {
  .site-header { padding: 0 1rem; }
  .brand-name { font-size: 0.72rem; }
  .header-nav a { font-size: 1.4rem; padding: 0.3rem 0.55rem; }
  .btn { width: 100%; }
  .hero-ctas { flex-direction: column; width: 100%; }
}