/* ==========================================================================
   SoloNova — Belle design system
   Violet/cyan neon on near-black. Inter for prose, JetBrains Mono for
   wordmarks, labels, and numerals. Every component tints itself from
   --accent / --accent-2 / --accent-glow so each app page recolors via
   body[data-app].
   ========================================================================== */

/* ---- Tokens ------------------------------------------------------------ */

:root {
  --bg: #0B0612;
  --surface-1: #15102A;
  --surface-2: #1F1838;
  --surface-3: #2A1F4A;

  --violet: #8B5CF6;
  --violet-dim: #6D28D9;
  --violet-bright: #A78BFA;
  --cyan: #06B6D4;
  --cyan-bright: #22D3EE;
  --green: #22C55E;
  --amber: #F59E0B;
  --red: #EF4444;

  --text-hi: #F4F1FF;
  --text-mid: #A89FC4;
  --text-low: #5F5780;

  --hairline: rgba(139, 92, 246, .2);
  --hairline-strong: rgba(139, 92, 246, .45);
  --grad-brand: linear-gradient(135deg, #8B5CF6, #06B6D4);
  --glow: 0 0 24px rgba(139, 92, 246, .35);

  --console-green: #4ecb71;
  --console-bg: #08080e;

  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', 'Cascadia Code', monospace;
  --track-wide: .18em;

  --radius: 16px;
  --nav-h: 4rem;

  --accent: var(--violet);
  --accent-2: var(--cyan-bright);
  --accent-glow: var(--glow);
  --accent-soft: rgba(139, 92, 246, .12);
}

body[data-app="belle"]   { --accent: #8B5CF6; --accent-2: #22D3EE; --accent-glow: 0 0 24px rgba(139, 92, 246, .35); --accent-soft: rgba(139, 92, 246, .12); }
body[data-app="segno"] { --accent: #A78BFA; --accent-2: #06B6D4; --accent-glow: 0 0 24px rgba(167, 139, 250, .35); --accent-soft: rgba(167, 139, 250, .12); }
body[data-app="pt"]      { --accent: #22D3EE; --accent-2: #22C55E; --accent-glow: 0 0 24px rgba(34, 211, 238, .3);  --accent-soft: rgba(34, 211, 238, .1); }

/* ---- Reset / base ------------------------------------------------------ */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 1rem);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-mid);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color-scheme: dark;
  overflow-x: clip;
}

h1, h2, h3, h4 {
  margin: 0 0 .5em;
  color: var(--text-hi);
  line-height: 1.15;
  font-weight: 700;
  text-wrap: balance;
}

p { margin: 0 0 1em; }

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: .25em; }

img, svg { max-width: 100%; height: auto; }

::selection { background: rgba(139, 92, 246, .45); color: var(--text-hi); }

:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip {
  position: absolute;
  left: -999px;
  top: .5rem;
  z-index: 200;
  padding: .5rem 1rem;
  background: var(--surface-2);
  color: var(--text-hi);
  border: 1px solid var(--hairline-strong);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: .8rem;
}
.skip:focus { left: .5rem; }

/* ---- Background: grid + neon washes ------------------------------------ */

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(139, 92, 246, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 92, 246, .05) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 100%);
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 100%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -3;
  pointer-events: none;
  background:
    radial-gradient(ellipse 55% 40% at 18% -5%, rgba(139, 92, 246, .14), transparent 70%),
    radial-gradient(ellipse 50% 35% at 85% 0%, rgba(6, 182, 212, .09), transparent 70%);
}

/* ---- Type helpers ------------------------------------------------------ */

.eyebrow {
  display: block;
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 500;
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--accent);
}

.grad-text {
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.lede {
  max-width: 44rem;
  font-size: 1.125rem;
  color: var(--text-mid);
}

.mono { font-family: var(--font-mono); }

/* ---- Layout ------------------------------------------------------------ */

.container {
  max-width: 1140px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

.section { padding-block: clamp(3.5rem, 8vw, 6.5rem); }
.section--tight { padding-block: clamp(2.5rem, 5vw, 4rem); }

.section-head { max-width: 46rem; margin-bottom: clamp(2rem, 4vw, 3rem); }
.section-head h2 { font-size: clamp(1.6rem, 3.5vw, 2.3rem); letter-spacing: -.02em; }

.hr-glow {
  border: 0;
  height: 1px;
  margin: 0;
  background: linear-gradient(90deg, transparent, var(--hairline-strong), transparent);
}

/* ---- Nav --------------------------------------------------------------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 6, 18, .8);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hairline);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--nav-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  color: var(--text-hi);
}
.brand:hover { text-decoration: none; }

.logo {
  display: inline-block;
  width: 30px;
  aspect-ratio: 1;
  flex: none;
  background: currentColor;
  -webkit-mask: url('/assets/img/solonova-logo.svg') center / contain no-repeat;
  mask: url('/assets/img/solonova-logo.svg') center / contain no-repeat;
}
.brand .logo { color: var(--violet-bright); filter: drop-shadow(0 0 8px rgba(139, 92, 246, .55)); }

.wordmark {
  font-family: var(--font-mono);
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--text-hi);
  white-space: nowrap;
}
.wordmark::before { content: "// "; color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(.9rem, 2.5vw, 1.75rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-mid);
  padding-block: .35rem;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--text-hi); text-decoration: none; }
.nav-links a[aria-current="page"] { color: var(--accent); border-bottom-color: var(--accent); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 0 9px;
  background: transparent;
  border: 1px solid var(--hairline);
  border-radius: 8px;
  cursor: pointer;
}
.nav-toggle .bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text-hi);
  border-radius: 2px;
  transition: transform .25s ease, opacity .25s ease;
}

/* Mobile nav only collapses when JS is present to open it again. */
@media (max-width: 840px) {
  html.js .nav-toggle { display: inline-flex; }
  html.js .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: .5rem clamp(1rem, 4vw, 2rem) 1rem;
    background: rgba(11, 6, 18, .96);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--hairline);
    display: none;
  }
  html.js .nav.nav-open .nav-links { display: flex; }
  html.js .nav-links a { padding: .8rem .25rem; border-bottom: 1px solid rgba(139, 92, 246, .08); }
  html.js .nav-links a[aria-current="page"] { border-bottom-color: var(--accent); }
  html.js .nav.nav-open .nav-toggle .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  html.js .nav.nav-open .nav-toggle .bar:nth-child(2) { opacity: 0; }
  html.js .nav.nav-open .nav-toggle .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  /* No-JS fallback: links stay visible as a wrapping row */
  html:not(.js) .nav-inner { flex-wrap: wrap; padding-block: .6rem; }
  html:not(.js) .nav-links { flex-wrap: wrap; gap: .75rem 1.1rem; }
}

/* ---- Buttons ----------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .8rem 1.6rem;
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: #0B0612;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: 0;
  border-radius: 10px;
  box-shadow: var(--accent-glow);
  cursor: pointer;
  transition: filter .2s ease, transform .2s ease, box-shadow .2s ease;
}
.btn:hover { filter: brightness(1.12); transform: translateY(-1px); text-decoration: none; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .8rem 1.6rem;
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-hi);
  background: transparent;
  border: 1px solid var(--hairline-strong);
  border-radius: 10px;
  transition: border-color .2s ease, background .2s ease, transform .2s ease;
}
.btn-ghost:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  text-decoration: none;
  transform: translateY(-1px);
}

/* ---- Pills & chips ----------------------------------------------------- */

.pill {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .3rem .8rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-hi);
  border: 1px solid var(--hairline-strong);
  border-radius: 999px;
  background: rgba(21, 16, 42, .6);
}
.pill::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px rgba(34, 197, 94, .8);
}
.pill--plain::before { display: none; }

.chip {
  display: inline-block;
  padding: .25rem .6rem;
  font-family: var(--font-mono);
  font-size: .66rem;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-mid);
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  white-space: nowrap;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .6rem;
  margin: 1.4rem 0;
}

/* ---- Hero -------------------------------------------------------------- */

.hero { padding-block: clamp(4rem, 10vw, 7.5rem) clamp(3rem, 7vw, 5rem); }

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -.03em;
}

.hero .lede { font-size: clamp(1.05rem, 1.8vw, 1.25rem); }

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: .9rem;
  margin-top: 2rem;
}

.hero--center { text-align: center; }
.hero--center .lede, .hero--center .meta-row, .hero--center .hero-ctas { margin-inline: auto; justify-content: center; }

.hero-logo {
  width: clamp(84px, 12vw, 120px);
  aspect-ratio: 1;
  margin-bottom: 1.25rem;
  margin-inline: auto;
  color: var(--violet-bright);
  filter: drop-shadow(0 0 18px rgba(139, 92, 246, .6)) drop-shadow(0 0 48px rgba(6, 182, 212, .25));
  background: currentColor;
  -webkit-mask: url('/assets/img/solonova-logo.svg') center / contain no-repeat;
  mask: url('/assets/img/solonova-logo.svg') center / contain no-repeat;
}

/* ---- Project cards (home) ---------------------------------------------- */

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
}

.card {
  --card-accent: var(--violet);
  display: flex;
  flex-direction: column;
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
  color: var(--text-mid);
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--card-accent);
  box-shadow: 0 0 28px color-mix(in srgb, var(--card-accent) 30%, transparent), 0 18px 40px rgba(0, 0, 0, .45);
  text-decoration: none;
}
.card--belle { --card-accent: #8B5CF6; }
.card--segno { --card-accent: #A78BFA; }
.card--pt { --card-accent: #22D3EE; }

.card-preview {
  position: relative;
  height: 180px;
  overflow: hidden;
  background: radial-gradient(ellipse 90% 90% at 50% 0%, var(--surface-2), var(--console-bg));
  border-bottom: 1px solid var(--hairline);
  display: grid;
  place-items: center;
}

.card-body { display: flex; flex-direction: column; flex: 1; padding: 1.4rem 1.4rem 1.5rem; }

.card-name {
  font-family: var(--font-mono);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--text-hi);
  margin-bottom: .45rem;
}
.card-name::before { content: "// "; color: var(--card-accent); }

.card-pitch { flex: 1; font-size: .94rem; margin-bottom: 1.1rem; }

.card-chips { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 1.2rem; }

.card-cta {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--card-accent);
}
.card-cta::after { content: " →"; transition: none; }
.card:hover .card-cta::after { content: " →→"; letter-spacing: -.35em; }

/* ---- Stats band -------------------------------------------------------- */

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
  text-align: center;
}

.stat {
  padding: 1.6rem 1rem;
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
}

.stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-hi);
  text-shadow: 0 0 18px rgba(139, 92, 246, .55);
}

.stat-label {
  display: block;
  margin-top: .4rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--text-low);
}

/* ---- Feature grid ------------------------------------------------------ */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.2rem;
}

.feature {
  padding: 1.5rem 1.5rem 1.6rem;
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  transition: border-color .25s ease, transform .25s ease;
}
.feature:hover { border-color: var(--accent); transform: translateY(-2px); }

.feature-glyph {
  display: inline-block;
  margin-bottom: .9rem;
  font-family: var(--font-mono);
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--accent);
  text-shadow: 0 0 12px color-mix(in srgb, var(--accent) 60%, transparent);
}

.feature h3 { font-size: 1.05rem; margin-bottom: .4rem; }
.feature p { margin: 0; font-size: .92rem; }

/* ---- Tech strip -------------------------------------------------------- */

.tech-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: .7rem;
}
.tech-strip .chip { padding: .45rem .95rem; font-size: .72rem; }

/* ---- Mockup showcase shells -------------------------------------------- */

.mock-section { margin-bottom: clamp(3rem, 7vw, 5.5rem); }
.mock-section:last-child { margin-bottom: 0; }

.callouts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
  margin-top: 1.8rem;
}

.callout { font-size: .9rem; }

.callout-n {
  display: block;
  margin-bottom: .35rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--accent);
}

.callout h3 { font-size: .95rem; margin-bottom: .25rem; }
.callout p { margin: 0; color: var(--text-mid); }

/* ---- More band + footer ------------------------------------------------ */

.more-band { border-top: 1px solid var(--hairline); }

.more-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.2rem;
}

.more-card {
  display: block;
  padding: 1.3rem 1.5rem;
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  color: var(--text-mid);
  transition: border-color .25s ease, transform .25s ease;
}
.more-card:hover { border-color: var(--accent); transform: translateY(-2px); text-decoration: none; }
.more-card .card-name { font-size: .92rem; }
.more-card p { margin: 0; font-size: .88rem; }

.footer {
  margin-top: clamp(3rem, 7vw, 5rem);
  border-top: 1px solid var(--hairline);
  background: rgba(8, 8, 14, .55);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2rem;
  padding-block: 3rem 2.5rem;
}

.footer h4 {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--text-low);
  margin-bottom: .9rem;
}

.footer ul { margin: 0; padding: 0; list-style: none; }
.footer li { margin-bottom: .5rem; }
.footer a { color: var(--text-mid); font-size: .92rem; }
.footer a:hover { color: var(--text-hi); }

.footer-brand p { font-size: .92rem; max-width: 26rem; }
.footer-brand .brand { margin-bottom: .9rem; }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .8rem;
  padding-block: 1.2rem;
  border-top: 1px solid rgba(139, 92, 246, .1);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-low);
}

/* ---- 404 --------------------------------------------------------------- */

.notfound {
  min-height: calc(100vh - var(--nav-h));
  display: grid;
  place-content: center;
  text-align: center;
  padding-block: 4rem;
}

.notfound-code {
  font-family: var(--font-mono);
  font-size: clamp(5rem, 20vw, 11rem);
  font-weight: 700;
  line-height: 1;
  color: var(--text-hi);
  text-shadow: 0 0 32px rgba(139, 92, 246, .6), 0 0 80px rgba(6, 182, 212, .3);
}

/* ---- Reveal (JS-gated) + motion ---------------------------------------- */

html.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .6s ease, transform .6s ease;
}
html.js .reveal.in { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .cards, .callouts { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(3, 1fr); gap: .7rem; }
  .more-cards { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.6rem; }
}

@media (max-width: 560px) {
  .stats { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  html { scroll-behavior: auto; }
}