/* ── Tokens ── */
:root {
  --bg: #070707;
  --bg2: #0e0e0e;
  --bg3: #161616;
  --border: rgba(255, 255, 255, 0.06);
  --border-h: rgba(255, 255, 255, 0.12);
  --ink: #cfcfcf;
  --ink-dim: #7f7f7f;
  --ink-dimmer: #444444;
  --ink-bright: #ffffff;
  --sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --radius: 12px;
}

/* ── Reset & Globals ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
*::-webkit-scrollbar { display: none; width: 0; height: 0; }
html { scroll-behavior: smooth; background: var(--bg); text-transform: lowercase; }
body {
  background: var(--bg); color: var(--ink);
  font-family: var(--sans); font-size: 14px; line-height: 1.6;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
a { color: inherit; text-decoration: none; text-transform: lowercase; }
img { display: block; }
code {
  font-family: var(--sans); font-size: 0.85em; font-weight: 500;
  background: var(--bg3); border: 1px solid var(--border);
  padding: 1px 6px; border-radius: 5px; color: var(--ink-bright);
}

/* ── Layout ── */
.section-inner { max-width: 1000px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 2; }
.section-label {
  font-size: 10px; font-weight: 600; letter-spacing: 1.5px;
  text-transform: lowercase; color: var(--ink-dimmer); margin-bottom: 12px;
}
.section-title {
  font-size: clamp(26px, 3.5vw, 36px); font-weight: 800;
  letter-spacing: -0.04em; line-height: 1.2; color: var(--ink-bright); margin-bottom: 14px;
}
.section-sub {
  font-size: 14px; color: var(--ink-dim);
  max-width: 520px; line-height: 1.65; margin-bottom: 40px;
}


/* ── Floating Nav Capsule ── */
.nav {
  position: fixed; top: 20px; left: 50%;
  transform: translateX(-50%); width: 90%; max-width: 760px; height: 54px;
  background: rgba(14, 14, 14, 0.75); backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px); border: 1px solid var(--border);
  border-radius: var(--radius); z-index: 100;
  padding: 0 8px 0 20px; display: flex; align-items: center; justify-content: space-between;
  box-shadow: 0 20px 40px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.03);
}
.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-logo-img { width: 28px; height: 28px; border-radius: 6px; object-fit: contain; }
.nav-logo-text { font-size: 15px; font-weight: 700; letter-spacing: -0.4px; color: var(--ink-bright); }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  font-size: 12px; font-weight: 500; color: var(--ink-dim);
  padding: 6px 12px; border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}
.nav-links a:hover { color: var(--ink-bright); background: rgba(255,255,255,0.04); }
.nav-actions { display: flex; align-items: center; }
.nav-btn-download {
  font-size: 12px; font-weight: 600; color: var(--bg) !important;
  background: var(--ink-bright); padding: 9px 20px; border-radius: 6px;
  transition: opacity 0.15s;
}
.nav-btn-download:hover { opacity: 0.9; }

/* ── Buttons ── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--ink-bright); color: var(--bg);
  font-family: var(--sans); font-size: 12px; font-weight: 600;
  padding: 11px 22px; border-radius: 6px;
  transition: opacity 0.15s; border: none; cursor: pointer;
  text-transform: lowercase;
}
.btn-primary:hover { opacity: 0.9; }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  background: transparent; color: var(--ink-dim);
  font-family: var(--sans); font-size: 12px; font-weight: 500;
  padding: 11px 22px; border-radius: 6px;
  border: 1px solid var(--border);
  transition: color 0.15s, border-color 0.15s; cursor: pointer;
  text-transform: lowercase;
}
.btn-secondary:hover { color: var(--ink-bright); border-color: var(--border-h); }

/* ── Hero ── */
.hero { padding: 150px 0 70px; position: relative; overflow: hidden; text-align: center; }
.hero-glow {
  position: absolute; border-radius: 50%; pointer-events: none;
  filter: blur(130px); opacity: 0.12; z-index: 1;
}
.hero-glow-1 {
  width: 320px; height: 320px;
  background: radial-gradient(circle, rgba(255,255,255,0.45) 0%, transparent 70%);
  top: -60px; left: 15%;
  animation: float-glow-1 16s ease-in-out infinite alternate;
}
.hero-glow-2 {
  width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
  bottom: -100px; right: 15%;
  animation: float-glow-2 22s ease-in-out infinite alternate;
}
@keyframes float-glow-1 {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, 30px) scale(1.1); }
}
@keyframes float-glow-2 {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-50px, -20px) scale(0.95); }
}
.hero-inner { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; align-items: center; position: relative; z-index: 5; }
.hero-title {
  font-size: clamp(34px, 5.5vw, 56px); font-weight: 800;
  letter-spacing: -0.04em; line-height: 1.12;
  background: linear-gradient(180deg, #ffffff 40%, #888888 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 20px;
}
.hero-accent {
  background: linear-gradient(180deg, #bbbbbb 30%, #555555 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub { font-size: 15px; color: var(--ink-dim); line-height: 1.7; margin-bottom: 36px; max-width: 580px; }
.hero-actions { display: flex; align-items: center; justify-content: center; gap: 10px; flex-wrap: wrap; }

/* ── Emerging Desktop Demo Showcase ── */
.demo-section { padding: 40px 0 100px; overflow: visible; position: relative; }
/* Scroll Perspective Container */
.demo-scroll-wrapper {
  perspective: 1200px;
  width: 100%;
  display: flex;
  justify-content: center;
  overflow: visible;
  padding: 20px 0;
}
.demo-desktop-container {
  width: 90%; max-width: 1100px; aspect-ratio: 16/9;
  background: #000000; border: 1px solid var(--border); border-radius: 16px;
  position: relative; overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.95), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  /* 3D Initial state for emerging effect */
  transform: rotateX(10deg) translateY(80px) scale(0.92);
  transform-origin: top center;
  opacity: 0.7;
  transition: transform 0.1s linear, opacity 0.1s linear, box-shadow 0.3s ease;
}

/* Vignette overlay */
.desktop-vignette {
  position: absolute; inset: 0; pointer-events: none;
  box-shadow: inset 0 0 100px rgba(0,0,0,0.8), inset 0 0 20px rgba(0,0,0,0.9);
  z-index: 5;
}

/* Background Screenshot Layers */
.demo-screenshot-layer { position: absolute; inset: 0; z-index: 1; }
.demo-screenshot {
  width: 100%; height: 100%; object-fit: cover;
  position: absolute; inset: 0; opacity: 0;
  transform: scale(1.03); filter: blur(4px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease), filter 0.8s var(--ease);
}
.demo-screenshot.active { opacity: 1; transform: scale(1); filter: blur(0); }

/* Custom HTML overlays (e.g. math notebook overlay) */
.demo-overlay-layer { position: absolute; inset: 0; z-index: 3; pointer-events: none; }
.math-notebook-overlay {
  position: absolute; top: 12%; left: 8%; width: 34%; height: 42%;
  background: rgba(14, 14, 14, 0.75); border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px; padding: 16px;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 24px 50px rgba(0,0,0,0.6);
  opacity: 0; transform: translateY(10px) scale(0.96);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.math-notebook-overlay.active { opacity: 1; transform: translateY(0) scale(1); }
.notebook-title { font-size: 10px; font-weight: 700; color: var(--ink-dim); text-transform: lowercase; margin-bottom: 8px; }
.notebook-body { display: flex; flex-direction: column; gap: 4px; }
.notebook-text { font-size: 11px; color: var(--ink); text-transform: lowercase; }
.notebook-equation { font-size: 14px; color: var(--ink-bright); text-align: center; margin-top: 10px; }

/* Floating Hotkey indicator on desktop */
.demo-hotkey-hint {
  position: absolute; top: 40%; left: 50%;
  transform: translate(-50%, -50%);
  display: flex; gap: 4px; align-items: center; z-index: 9;
  opacity: 0; transition: opacity 0.3s ease; pointer-events: none;
}
.demo-hotkey-hint.visible { opacity: 1; }
.demo-hotkey-hint kbd {
  font-size: 11px; font-weight: 600;
  color: var(--ink-dim); background: var(--bg2); border: 1px solid var(--border-h);
  padding: 4px 9px; border-radius: 6px; line-height: 1.4; text-transform: lowercase;
}
.plus { font-size: 10px; color: var(--ink-dimmer); }

/* Interactive overlay Floaty Pill wrapper */
.mock-pill-wrap {
  position: absolute; bottom: 8%; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  width: 90%; max-width: 520px; z-index: 10;
  opacity: 0; transition: opacity 0.35s var(--ease);
}
.mock-pill-wrap.visible { opacity: 1; }

.mock-expand-panel {
  width: 100%; background: rgba(8, 8, 8, 0.94);
  border: 1px solid rgba(255, 255, 255, 0.08); border-radius: 10px;
  overflow: hidden; max-height: 0; opacity: 0;
  transform: scaleY(0.9) translateY(5px); transform-origin: bottom center;
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.8);
  transition: max-height 450ms var(--ease), opacity 300ms ease, transform 380ms var(--ease);
}
.mock-expand-panel.visible { max-height: 260px; opacity: 1; transform: scaleY(1) translateY(0); }
.mock-expand-content {
  padding: 12px 16px; font-size: 12px; line-height: 1.6;
  color: #ccc; font-family: var(--sans); text-transform: lowercase;
}
.mock-expand-content strong { color: #fff; font-weight: 600; }
.mock-expand-content .mock-hr { border: none; border-top: 1px solid rgba(255,255,255,0.06); margin: 6px 0; }
.mock-tool-call {
  display: flex; align-items: center; gap: 6px; margin: 4px 0;
  font-size: 11px; color: var(--ink-dim); text-transform: lowercase;
}
.mock-tool-call svg { flex-shrink: 0; stroke: currentColor; }
.mock-math { display: flex; justify-content: center; padding: 4px 0; }
.mock-math .katex { font-size: 1.05em; }

.mock-pill {
  height: 44px;
  background: rgba(10, 10, 10, 0.96); border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px; display: flex; align-items: center; padding: 0 16px;
  position: relative; overflow: hidden; align-self: center;
  width: 82%; max-width: 410px; backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  transition: width 400ms var(--ease), border-color 200ms ease;
}
.mock-pill.shrunk { width: 96px; }
.mock-pill.thinking { border-color: rgba(255, 255, 255, 0.16); }
.mock-pill-row { display: flex; align-items: center; width: 100%; }

.mock-provider-indicator {
  width: 16px; height: 16px; border-radius: 4px;
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.08);
  display: flex; align-items: center; justify-content: center;
  margin-right: 6px; flex-shrink: 0; color: var(--ink-bright); overflow: hidden;
  transition: opacity 0.2s, width 0.25s var(--ease), margin 0.25s var(--ease);
}
.mock-provider-indicator.hidden { opacity: 0; width: 0; margin-right: 0; border-color: transparent; }
.mock-provider-indicator img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(100%) brightness(0.85); }

.mock-input {
  flex: 1; background: transparent; border: none; outline: none;
  color: var(--ink); font-size: 11px; font-family: var(--sans);
  cursor: default; white-space: nowrap; overflow: hidden;
  transition: opacity 0.15s; text-transform: lowercase;
}
.mock-input::placeholder { color: var(--ink-dimmer); }
.mock-input.fade { opacity: 0; }

/* 5-bar thick waveform animation */
.mock-waveform {
  display: none; align-items: center; gap: 3px;
  position: absolute; left: 50%; transform: translateX(-50%);
}
.mock-waveform.visible { display: flex; }
.mock-waveform .bar {
  width: 3px; height: 14px; border-radius: 1.5px; background: rgba(255, 255, 255, 0.7);
  transform: scaleY(0.25); transform-origin: center;
  animation: wave 1.2s ease-in-out infinite;
}
.mock-waveform .bar:nth-child(1){--s:0.5;animation-delay:-0.1s}
.mock-waveform .bar:nth-child(2){--s:1.0;animation-delay:-0.2s}
.mock-waveform .bar:nth-child(3){--s:1.4;animation-delay:-0.3s}
.mock-waveform .bar:nth-child(4){--s:1.0;animation-delay:-0.4s}
.mock-waveform .bar:nth-child(5){--s:0.5;animation-delay:-0.5s}
@keyframes wave { 0%,100%{transform:scaleY(0.25)} 50%{transform:scaleY(var(--s,1.2))} }

/* ── Features ── */
.features { padding: 100px 0; border-top: 1px solid var(--border); }
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px; background: var(--border);
  border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
}
/* ── Spotlight Card Utility ── */
.spotlight-card {
  position: relative;
  overflow: hidden;
}
.spotlight-card::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(circle 140px at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255, 255, 255, 0.035) 0%, transparent 100%);
  opacity: 0; transition: opacity 0.4s ease; z-index: 1;
}
.spotlight-card > * {
  position: relative; z-index: 2;
}
.spotlight-card:hover::before {
  opacity: 1;
}

.feature-card {
  background: var(--bg); padding: 26px;
  border: 1px solid transparent;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}
.feature-card:hover {
  background: var(--bg2);
  border-color: rgba(255, 255, 255, 0.05);
}
.feature-icon {
  width: 32px; height: 32px; background: var(--bg3); border: 1px solid var(--border);
  border-radius: 8px; display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px; color: var(--ink-dim);
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease);
}
.feature-card:hover .feature-icon {
  border-color: rgba(255,255,255,0.15);
  color: var(--ink-bright);
}
.feature-card h3 { font-size: 13px; font-weight: 600; color: var(--ink-bright); margin-bottom: 6px; letter-spacing: -0.01em; text-transform: lowercase; }
.feature-card p { font-size: 12px; color: var(--ink-dim); line-height: 1.6; text-transform: lowercase; }

/* ── Providers & Infinite Marquee ── */
.providers { padding: 100px 0 20px; border-top: 1px solid var(--border); }
.marquee-container {
  overflow: hidden; width: 100%; position: relative;
  padding: 40px 0; background: transparent;
  display: flex; align-items: center;
  mask-image: linear-gradient(to right, transparent, #000 15%, #000 85%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, #000 15%, #000 85%, transparent);
}
.marquee-track {
  display: flex; align-items: center; gap: 70px;
  width: max-content; animation: marquee 35s linear infinite;
}
.marquee-item {
  display: flex; align-items: center; gap: 10px;
  color: var(--ink-dim); filter: grayscale(100%) opacity(0.5);
  transition: filter 0.25s, color 0.25s;
}
.marquee-item:hover {
  filter: grayscale(0%) opacity(0.9); color: var(--ink-bright);
}
.marquee-logo {
  height: 26px; width: auto; max-width: 90px; object-fit: contain;
}
.marquee-logo.svg-icon {
  width: 26px; height: 26px; color: currentColor;
}
.invert-logo {
  filter: invert(1);
}
.marquee-text {
  font-size: 16px; font-weight: 600; letter-spacing: -0.2px; text-transform: lowercase;
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ── Floaty Cloud Section ── */
.cloud-section {
  padding: 20px 0 100px;
}
.cloud-card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 30px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; box-shadow: 0 12px 30px rgba(0,0,0,0.4);
  transition: border-color 0.3s, box-shadow 0.3s;
}
.cloud-card:hover {
  border-color: rgba(255,255,255,0.18);
  box-shadow: 0 20px 40px rgba(0,0,0,0.6), 0 0 30px rgba(255,255,255,0.02);
}
.cloud-left {
  display: flex; align-items: flex-start; gap: 20px;
}
.cloud-icon {
  width: 42px; height: 42px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg3); object-fit: contain; flex-shrink: 0;
}
.cloud-meta {
  display: flex; flex-direction: column; align-items: flex-start; text-align: left;
}
.cloud-badge-label {
  font-size: 8px; font-weight: 700; color: var(--ink-dimmer);
  background: var(--bg3); border: 1px solid var(--border);
  padding: 2px 7px; border-radius: 4px; text-transform: lowercase;
  margin-bottom: 8px; letter-spacing: 0.5px;
}
.cloud-title {
  font-size: 16px; font-weight: 700; color: var(--ink-bright);
  margin-bottom: 6px; text-transform: lowercase;
}
.cloud-description {
  font-size: 12px; color: var(--ink-dim); line-height: 1.6;
  max-width: 580px; text-transform: lowercase;
}
.cloud-right {
  flex-shrink: 0;
}
.cloud-status {
  font-size: 10px; font-weight: 600; color: var(--ink-dimmer);
  border: 1px dashed var(--border); padding: 6px 14px;
  border-radius: 6px; text-transform: lowercase;
}

/* ── CTA ── */
.cta { padding: 100px 0; border-top: 1px solid var(--border); }
.cta-inner { display: flex; flex-direction: column; align-items: center; text-align: center; }
.cta-logo { width: 44px; height: 44px; border-radius: 10px; margin-bottom: 20px; border: 1px solid var(--border); }
.cta-title { font-size: clamp(26px, 3.5vw, 36px); font-weight: 800; letter-spacing: -0.04em; color: var(--ink-bright); margin-bottom: 12px; text-transform: lowercase; }
.cta-sub { font-size: 14px; color: var(--ink-dim); max-width: 440px; line-height: 1.6; margin-bottom: 28px; text-transform: lowercase; }
.cta-actions { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; justify-content: center; }
.cta-note { font-size: 10px; color: var(--ink-dimmer); letter-spacing: 0.3px; text-transform: lowercase; }



/* Scroll fade interactions */
.fade-in { opacity: 0; transform: translateY(10px); transition: opacity 0.5s var(--ease), transform 0.5s var(--ease); }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* Custom CLI Terminal */
.custom-terminal {
  background: #09090b;
  display: flex; flex-direction: column;
  box-sizing: border-box; text-align: left;
}
.terminal-header {
  height: 36px; background: #121214;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  display: flex; align-items: center; padding: 0 16px; gap: 6px;
}
.terminal-dot {
  width: 8px; height: 8px; border-radius: 50%; display: inline-block;
}
.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27c93f; }
.terminal-title {
  margin-left: 10px; font-size: 10px; color: #71717a; font-family: var(--sans);
  font-weight: 500; letter-spacing: -0.1px;
}
.terminal-body {
  flex: 1; padding: 20px; font-family: monospace; font-size: 11px;
  line-height: 1.8; color: #d4d4d8; overflow: hidden;
}
.term-line { margin-bottom: 6px; white-space: pre-wrap; }
.term-line.dim { color: #52525b; }
.term-prompt { color: #888; font-weight: 600; }
.term-line-cursor {
  display: inline-block; width: 6px; height: 12px; background: #a1a1aa;
  animation: term-blink 1s step-end infinite;
  margin-left: 2px; vertical-align: middle;
}
@keyframes term-blink {
  from, to { background-color: transparent }
  50% { background-color: #a1a1aa }
}

/* Terminal Widgets & SVG Chart Animate */
.terminal-widget-row {
  display: flex; gap: 12px; margin: 16px 0;
}
.term-widget {
  flex: 1; background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 8px; padding: 12px;
  display: flex; flex-direction: column; gap: 8px;
}
.widget-header {
  display: flex; align-items: center; justify-content: space-between;
}
.widget-symbol {
  font-size: 11px; font-weight: 700; color: #fff; letter-spacing: 0.5px;
}
.widget-price {
  font-size: 11px; font-weight: 600; color: #fff;
}
.widget-change {
  font-size: 9px; font-weight: 600;
}
.widget-change.positive {
  color: #a1a1aa;
}
.widget-chart-wrap {
  position: relative; height: 50px; width: 100%;
}
.widget-svg-chart {
  width: 100%; height: 100%; display: block;
}
.chart-path-line {
  stroke: #ffffff; stroke-width: 1.5; fill: none;
  stroke-dasharray: 200; stroke-dashoffset: 200;
  transition: stroke-dashoffset 2.5s var(--ease);
}
.custom-terminal.active .chart-path-line {
  stroke-dashoffset: 0;
}
.chart-path-bg {
  fill: url(#chartGrad); opacity: 0;
  transition: opacity 2s var(--ease);
}
.custom-terminal.active .chart-path-bg {
  opacity: 0.15;
}

/* Weather Widget */
.widget-location {
  font-size: 11px; font-weight: 700; color: #fff; text-transform: lowercase;
}
.widget-temp {
  font-size: 14px; font-weight: 700; color: #fff;
}
.weather-info {
  display: flex; align-items: center; gap: 8px; margin-top: auto;
}
.weather-icon {
  font-size: 20px;
}
.weather-desc {
  font-size: 10px; color: #888; text-transform: lowercase;
}

/* Custom Math Canvas Document */
.custom-math-canvas {
  background: #09090a;
  display: flex; flex-direction: column;
  box-sizing: border-box; text-align: left;
}
.math-header {
  height: 36px; background: #121214;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  display: flex; align-items: center; padding: 0 16px;
}
.math-title {
  font-size: 10px; color: #71717a; font-family: var(--sans);
  font-weight: 600; letter-spacing: -0.1px;
}
.math-body {
  flex: 1; padding: 30px; font-family: var(--sans);
}
.math-doc-text {
  font-size: 12px; color: #888; line-height: 1.6; margin-bottom: 12px;
}
.math-doc-text.dim { color: #444; font-size: 11px; }
.math-doc-equation {
  margin: 20px 0; display: flex; justify-content: center;
  color: #ffffff; font-size: 14px;
}

/* Download Dropdown */
.download-dropdown-container {
  position: relative;
  display: inline-block;
}
#downloadDropdownBtn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.dropdown-chevron {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  transition: transform 0.2s var(--ease);
}
.download-dropdown-container.open .dropdown-chevron {
  transform: rotate(180deg);
}
.download-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--bg2);
  border: 1px solid var(--border-h);
  border-radius: 8px;
  padding: 6px;
  min-width: 180px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s var(--ease);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  z-index: 10;
}
.download-dropdown-container.open .download-dropdown-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.dropdown-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  color: var(--ink-dim);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  transition: all 0.2s ease;
  text-transform: lowercase;
}
.dropdown-item:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--ink-bright);
}
.dropdown-item .about-arrow-icon {
  width: 12px;
  height: 12px;
  opacity: 0.4;
  transition: transform 0.2s, opacity 0.2s;
}
.dropdown-item:hover .about-arrow-icon {
  transform: translate(1px, -1px);
  opacity: 0.8;
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .hero-inner { gap: 48px; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .nav { width: 95%; }
}
@media (max-width: 600px) {
  .features-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .section-inner { padding: 0 16px; }
  .hero { padding: 120px 0 60px; }
}

/* About Developer Pill */
.about-pill-container {
  margin-top: 30px;
  display: flex;
  justify-content: center;
}
.about-pill {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  color: var(--ink-dim);
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-transform: lowercase;
}
.about-pill:hover {
  color: var(--ink-bright);
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border-h);
}

/* About Modal Overlay */
.about-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.about-overlay.open {
  opacity: 1;
  pointer-events: auto;
}
.about-modal {
  background: var(--bg2);
  border: 1px solid var(--border-h);
  border-radius: 16px;
  padding: 32px;
  width: 90%;
  max-width: 440px;
  position: relative;
  transform: translateY(20px);
  transition: transform 0.3s var(--ease);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.8);
}
.about-overlay.open .about-modal {
  transform: translateY(0);
}
.about-close-btn {
  position: absolute;
  top: 12px;
  right: 18px;
  background: transparent;
  border: none;
  color: var(--ink-dim);
  font-size: 24px;
  cursor: pointer;
  transition: color 0.2s;
  line-height: 1;
}
.about-close-btn:hover {
  color: var(--ink-bright);
}
.about-modal-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-bright);
  margin-bottom: 24px;
  text-align: center;
  text-transform: lowercase;
}
.about-modal-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.about-modal-link {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink-dim);
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  transition: all 0.2s ease;
  text-transform: lowercase;
}
.about-modal-link:hover {
  color: var(--ink-bright);
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border-h);
}
.about-link-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  stroke: currentColor;
}
.about-link-text {
  flex-grow: 1;
  text-transform: lowercase;
}
.about-arrow-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  stroke: currentColor;
  opacity: 0.4;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}
.about-modal-link:hover .about-arrow-icon {
  transform: translate(2px, -2px);
  opacity: 0.8;
}