@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Space+Mono:wght@400;700&display=swap');

:root {
  --black: #0a0a0a;
  --surface: #111111;
  --surface2: #1a1a1a;
  --border: #222222;
  --green: #C5FD04; /* the app's actual accent (and logo neon) */
  --green-bright: #d6ff45;
  --green-dim: rgba(197, 253, 4, 0.12);
  --green-glow: rgba(197, 253, 4, 0.25);
  --white: #f0f0f0;
  --muted: #666666;
  --mono: 'Space Mono', monospace;
  --sans: 'Space Grotesk', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--black);
  color: var(--white);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* ─── NAV ─── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2.5rem;
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--green);
  letter-spacing: 0.08em;
}

.nav-logo span { color: var(--white); }

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-transform: uppercase;
  transition: color 0.2s;
}

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

/* ─── HERO ─── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 8rem 2.5rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(200,255,0,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--green);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 6.5rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  max-width: 900px;
}

.hero-title .accent { color: var(--green); }

.hero-sub {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 480px;
  margin-bottom: 3rem;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--green);
  color: var(--black);
  padding: 0.85rem 2rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary:hover {
  background: var(--green-bright);
  transform: translateY(-1px);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  color: var(--white);
  padding: 0.85rem 2rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.2s;
}

.btn-ghost:hover {
  border-color: var(--green);
  color: var(--green);
}

/* ─── SECTION ─── */
.section {
  padding: 6rem 2.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  color: var(--green);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 3.5rem;
}

/* ─── PRODUCT GRID ─── */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5px;
  background: var(--border);
}

.product-card {
  background: var(--surface);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  cursor: pointer;
  transition: background 0.2s;
  position: relative;
  overflow: hidden;
}

.product-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--green);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.product-card:hover { background: var(--surface2); }
.product-card:hover::after { transform: scaleX(1); }

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.card-badge {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  color: var(--black);
  background: var(--green);
  padding: 0.2rem 0.5rem;
  font-weight: 700;
}

.card-price {
  font-family: var(--mono);
  font-size: 1.1rem;
  color: var(--green);
  font-weight: 700;
}

.card-name {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.card-tagline {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.5;
}

.card-tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.tag {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 0.2rem 0.5rem;
  text-transform: uppercase;
}

.card-controls-preview {
  margin-top: 0.5rem;
}

.controls-preview-label {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.controls-preview-list {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.ctrl-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--border);
}

.ctrl-name { color: var(--white); }
.ctrl-type { color: var(--green); opacity: 0.7; }

.card-more {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--muted);
  letter-spacing: 0.1em;
}

.card-footer {
  display: flex;
  gap: 0.75rem;
  margin-top: auto;
  padding-top: 1rem;
}

.card-btn {
  flex: 1;
  padding: 0.7rem 1rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: center;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.card-btn-primary {
  background: var(--green);
  color: var(--black);
}

.card-btn-primary:hover { background: var(--green-bright); }

.card-btn-secondary {
  background: transparent;
  color: var(--white);
  border: 1px solid var(--border);
}

.card-btn-secondary:hover {
  border-color: var(--green);
  color: var(--green);
}

/* ─── CURVE PREVIEW (product cards) ─── */
.card-curves {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-top: 0.5rem;
}

.card-curve-cell {
  background: var(--surface2);
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  align-items: center;
}

.card-curve-cell svg { width: 100%; height: auto; display: block; }

.card-curve-name {
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
  white-space: nowrap;
}

/* ─── PRESET LIBRARY GALLERY ─── */
.curve-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.curve-filter {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  transition: all 0.15s;
}

.curve-filter:hover { color: var(--green); border-color: var(--green); }

.curve-filter.active {
  color: var(--black);
  background: var(--green);
  border-color: var(--green);
  font-weight: 700;
}

.curve-filter-row {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
}

.curve-filter-label {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  color: var(--muted);
  text-transform: uppercase;
  min-width: 70px;
}

.curve-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 1.5px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-top: 1.5rem;
}

.curve-card {
  background: var(--surface);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: background 0.15s;
}

.curve-card:hover { background: var(--surface2); }
.curve-card:hover .curve-path { filter: brightness(1.2); }

.curve-card svg { width: 100%; height: auto; display: block; }

/* --c = per-family color (the app's rainbow accent); falls back to brand green */
.curve-path {
  fill: none;
  stroke: var(--c, var(--green));
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.curve-gridline { stroke: #2a2a2a; stroke-width: 1; vector-effect: non-scaling-stroke; }
.curve-endpoint { fill: var(--white); }
.curve-keypoint { fill: var(--white); stroke: #0d0d0d; stroke-width: 0.8; }

.curve-card-name {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.05em;
}

.curve-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
}

.curve-card-dir {
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.1em;
  color: var(--black);
  background: var(--c, var(--green));
  padding: 0.1rem 0.4rem;
  font-weight: 700;
  text-transform: uppercase;
}

.curve-card-detail {
  font-family: var(--mono);
  font-size: 0.55rem;
  color: var(--muted);
  letter-spacing: 0.03em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.curve-count {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.1em;
}

/* ─── FOOTER ─── */
footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--green);
  font-weight: 700;
}

.footer-copy {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--muted);
  letter-spacing: 0.1em;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-transform: uppercase;
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--green); }

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--black); }
::-webkit-scrollbar-thumb { background: var(--border); }
::-webkit-scrollbar-thumb:hover { background: var(--green); }

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
  nav { padding: 1rem 1.5rem; }
  .nav-links { display: none; }
  .hero { padding: 7rem 1.5rem 3rem; }
  .section { padding: 4rem 1.5rem; }
  .product-grid { grid-template-columns: 1fr; }
  footer { flex-direction: column; align-items: flex-start; }
}