/* FlutterClaw Landing — aggressive, modern */

:root {
  /* Dark, high-contrast base; mascot accents: red, blue, magenta */
  --color-bg: #060608;
  --color-bg-alt: #0c0c0f;
  --color-bg-card: #121216;
  --color-text: #fafafa;
  --color-text-muted: #a1a1aa;
  --color-accent: #ff3366;
  --color-accent-secondary: #6366f1;
  --color-accent-hover: #ff5588;
  --color-border: rgba(255, 255, 255, 0.14);
  --color-card-border: rgba(255, 255, 255, 0.1);
  --color-glow: rgba(255, 51, 102, 0.35);

  /* Typography — bold, tight */
  --font-system: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", monospace;

  --text-hero: 3.25rem;
  --text-h2: 2.25rem;
  --text-h3: 1.125rem;
  --text-body: 1rem;
  --text-small: 0.875rem;
  --line-height-tight: 1.1;
  --line-height-body: 1.5;
  --line-height-relaxed: 1.6;
  --letter-tight: -0.03em;

  /* Spacing & layout */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  --max-width: 720px;
  --max-width-wide: 1100px;
  --radius: 8px;
  --radius-sm: 6px;
  --transition: 0.18s ease;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-system);
  font-size: var(--text-body);
  line-height: var(--line-height-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-hover); }
a:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-system);
  font-size: var(--text-body);
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius);
  transition: background-color var(--transition), color var(--transition), box-shadow var(--transition), transform 0.15s ease;
}
.btn:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.btn-primary,
.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active,
.btn-primary:visited {
  color: #fff !important;
}
.btn-primary {
  background-color: var(--color-accent);
  border: none;
  box-shadow: 0 0 28px var(--color-glow);
}
.btn-primary:hover {
  background-color: var(--color-accent-hover);
  box-shadow: 0 0 40px rgba(255, 51, 102, 0.4);
  transform: translateY(-1px);
}
.btn-ghost {
  background-color: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.btn-ghost:hover {
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--color-text);
  border-color: rgba(255, 255, 255, 0.2);
}
/* Header GitHub = primary style so it stands out; keep text white on all states */
.site-header .btn-ghost,
.site-header .btn-ghost:hover,
.site-header .btn-ghost:focus,
.site-header .btn-ghost:active {
  color: #fff !important;
}
.site-header .btn-ghost {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}
.site-header .btn-ghost:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}
.site-header .btn-ghost:focus-visible {
  outline-color: #fff;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 6, 8, 0.9);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text);
}
.logo-link:hover { color: var(--color-text); }
.logo-img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
}
.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: var(--letter-tight);
}
.nav { display: flex; gap: var(--space-sm); }

/* Hero */
.hero {
  padding: var(--space-3xl) var(--space-lg);
  position: relative;
}
.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  max-width: 600px;
  height: 60%;
  background: radial-gradient(ellipse, var(--color-glow) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0.5;
}
.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
  position: relative;
}
.hero-logo {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--space-lg);
  display: block;
  border-radius: 24px;
  object-fit: contain;
}
.hero-title {
  font-size: var(--text-hero);
  font-weight: 800;
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-tight);
  margin: 0 0 var(--space-md);
  background: linear-gradient(180deg, #fff 0%, rgba(255,255,255,0.85) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 1.125rem;
  line-height: var(--line-height-relaxed);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-sm);
  max-width: 40rem;
  margin-left: auto;
  margin-right: auto;
}
.hero-tagline {
  font-size: var(--text-small);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-xl);
  opacity: 0.9;
}
.hero-cta { margin-bottom: var(--space-md); }
.hero-based {
  font-size: var(--text-small);
  color: var(--color-text-muted);
  opacity: 0.75;
}
.hero-based a { color: var(--color-text-muted); text-decoration: underline; text-underline-offset: 2px; }
.hero-based a:hover { color: var(--color-text); }

/* Section common */
.section-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}
.section-title {
  font-size: var(--text-h2);
  font-weight: 700;
  letter-spacing: var(--letter-tight);
  margin: 0 0 var(--space-sm);
  text-align: center;
  color: var(--color-text);
}
.section-lead {
  text-align: center;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-xl);
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
  font-size: var(--text-body);
}

/* Screenshots */
.screenshots {
  padding: var(--space-3xl) 0;
  background-color: var(--color-bg-alt);
}
.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}
.screenshot-item {
  margin: 0;
  background: var(--color-bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-card-border);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.screenshot-item:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 51, 102, 0.2);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}
.screenshot-item img {
  width: 100%;
  aspect-ratio: 9 / 19;
  object-fit: cover;
}
.screenshot-item figcaption {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--text-small);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

/* Features */
.features {
  padding: var(--space-3xl) 0;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}
.feature-card {
  background: var(--color-bg-card);
  padding: var(--space-xl);
  border-radius: var(--radius);
  border: 1px solid var(--color-card-border);
  transition: border-color var(--transition), box-shadow var(--transition), transform 0.15s ease;
}
.feature-card:hover {
  border-color: rgba(255, 51, 102, 0.25);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  transform: translateY(-2px);
}
.feature-card h3 {
  font-size: var(--text-h3);
  font-weight: 700;
  margin: 0 0 var(--space-sm);
  letter-spacing: var(--letter-tight);
  color: var(--color-text);
}
.feature-card p {
  margin: 0;
  font-size: var(--text-small);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-muted);
}

/* Quick Start */
.quick-start {
  padding: var(--space-3xl) 0;
  background-color: var(--color-bg-alt);
}
.quick-start .section-lead {
  margin-bottom: var(--space-2xl);
}
.quick-start-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
  max-width: 32rem;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}
.quick-step {
  background: var(--color-bg-card);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius);
  padding: var(--space-lg);
  position: relative;
  transition: border-color var(--transition), transform 0.2s ease, box-shadow var(--transition);
  min-width: 0;
}
.quick-step:hover {
  border-color: rgba(255, 51, 102, 0.3);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}
.quick-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 800;
  margin-bottom: var(--space-md);
}
.quick-step-title {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: var(--letter-tight);
  margin: 0 0 var(--space-xs);
  color: var(--color-text);
}
.quick-step-desc {
  font-size: var(--text-small);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-sm);
  line-height: 1.4;
}
.quick-step-code {
  margin: 0;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--color-text);
  max-width: 100%;
}
.quick-step-code code {
  color: #67e8f9;
  display: inline-block;
  min-width: min-content;
  white-space: pre;
}
.quick-start-cta {
  text-align: center;
  margin-top: var(--space-2xl);
}
.quick-start-cta .btn-primary,
.quick-start-cta .btn-primary:hover,
.quick-start-cta .btn-primary:focus,
.quick-start-cta .btn-primary:active,
.quick-start-cta .btn-primary:visited {
  color: #fff !important;
}

/* Footer */
.site-footer {
  padding: var(--space-xl) var(--space-lg);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}
.footer-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  text-align: center;
  font-size: var(--text-small);
  color: var(--color-text-muted);
}
.footer-link { color: var(--color-text-muted); }
.footer-link:hover { color: var(--color-accent); }
.footer-sep { margin: 0 var(--space-xs); opacity: 0.5; }
.footer-license { color: var(--color-text-muted); }

/* Responsive */
@media (max-width: 768px) {
  :root {
    --text-hero: 2.25rem;
    --text-h2: 1.75rem;
  }
  .hero { padding: var(--space-2xl) var(--space-md); }
  .hero-logo { width: 96px; height: 96px; margin-bottom: var(--space-md); }
  .hero-subtitle { font-size: 1rem; }
  .screenshot-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }
  .screenshot-item img { aspect-ratio: 9 / 19; }
  .feature-grid { grid-template-columns: 1fr; }
  .section-inner { padding: 0 var(--space-md); }
  .header-inner { padding: var(--space-sm) var(--space-md); }
  .quick-start-cards { max-width: none; padding: 0; }
  .quick-step { padding: var(--space-md); }
  .quick-step-code { font-size: 0.75rem; padding: var(--space-sm) var(--space-md); }
}

@media (max-width: 480px) {
  .screenshot-grid { grid-template-columns: 1fr; }
  .logo-text { font-size: 1.125rem; }
  .section-inner { padding: 0 var(--space-sm); }
  .quick-step { padding: var(--space-sm); }
  .quick-step-code {
    font-size: 0.6875rem;
    padding: 0.5rem var(--space-sm);
    /* Horizontal scroll so full URL/commands visible; touch-friendly */
    -webkit-overflow-scrolling: touch;
  }
  .quick-step-code code {
    white-space: pre;
  }
}